Rollup merge of #39561 - phungleson:libcollectionsbench, r=alexcrichton

Extract collections benchmarks to libcollections/bench

Good suggestion from @stjepang https://github.com/rust-lang/rust/issues/39484#issuecomment-277467765

r? @alexcrichton

31 files changed, 1442 insertions, 1372 deletions

diff --git a/src/libcollections/Cargo.toml b/src/libcollections/Cargo.toml
index 186ba6e8f21..02b2171a224 100644
--- a/src/libcollections/Cargo.toml
+++ b/src/libcollections/Cargo.toml
@@ -16,7 +16,6 @@ std_unicode = { path = "../libstd_unicode" }
 name = "collectionstest"
 path = "../libcollectionstest/lib.rs"
 
-# FIXME: need to extract benchmarks to separate crate
-#[[bench]]
-#name = "collectionstest"
-#path = "../libcollectionstest/lib.rs"
+[[bench]]
+name = "collectionsbenches"
+path = "../libcollections/benches/lib.rs"
diff --git a/src/libcollectionstest/bench.rs b/src/libcollections/benches/btree/map.rs
index 4e150d4a222..744afb991b0 100644
--- a/src/libcollectionstest/bench.rs
+++ b/src/libcollections/benches/btree/map.rs
@@ -1,4 +1,4 @@
-// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
 // file at the top-level directory of this distribution and at
 // http://rust-lang.org/COPYRIGHT.
 //
@@ -8,13 +8,17 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+
+use std::iter::Iterator;
+use std::vec::Vec;
+use std::collections::BTreeMap;
+use std::__rand::{Rng, thread_rng};
+use test::{Bencher, black_box};
+
 macro_rules! map_insert_rand_bench {
     ($name: ident, $n: expr, $map: ident) => (
         #[bench]
-        pub fn $name(b: &mut ::test::Bencher) {
-            use std::__rand::{thread_rng, Rng};
-            use test::black_box;
-
+        pub fn $name(b: &mut Bencher) {
             let n: usize = $n;
             let mut map = $map::new();
             // setup
@@ -39,9 +43,7 @@ macro_rules! map_insert_rand_bench {
 macro_rules! map_insert_seq_bench {
     ($name: ident, $n: expr, $map: ident) => (
         #[bench]
-        pub fn $name(b: &mut ::test::Bencher) {
-            use test::black_box;
-
+        pub fn $name(b: &mut Bencher) {
             let mut map = $map::new();
             let n: usize = $n;
             // setup
@@ -64,12 +66,7 @@ macro_rules! map_insert_seq_bench {
 macro_rules! map_find_rand_bench {
     ($name: ident, $n: expr, $map: ident) => (
         #[bench]
-        pub fn $name(b: &mut ::test::Bencher) {
-            use std::iter::Iterator;
-            use std::__rand::{thread_rng, Rng};
-            use std::vec::Vec;
-            use test::black_box;
-
+        pub fn $name(b: &mut Bencher) {
             let mut map = $map::new();
             let n: usize = $n;
 
@@ -97,9 +94,7 @@ macro_rules! map_find_rand_bench {
 macro_rules! map_find_seq_bench {
     ($name: ident, $n: expr, $map: ident) => (
         #[bench]
-        pub fn $name(b: &mut ::test::Bencher) {
-            use test::black_box;
-
+        pub fn $name(b: &mut Bencher) {
             let mut map = $map::new();
             let n: usize = $n;
 
@@ -118,3 +113,45 @@ macro_rules! map_find_seq_bench {
         }
     )
 }
+
+map_insert_rand_bench!{insert_rand_100,    100,    BTreeMap}
+map_insert_rand_bench!{insert_rand_10_000, 10_000, BTreeMap}
+
+map_insert_seq_bench!{insert_seq_100,    100,    BTreeMap}
+map_insert_seq_bench!{insert_seq_10_000, 10_000, BTreeMap}
+
+map_find_rand_bench!{find_rand_100,    100,    BTreeMap}
+map_find_rand_bench!{find_rand_10_000, 10_000, BTreeMap}
+
+map_find_seq_bench!{find_seq_100,    100,    BTreeMap}
+map_find_seq_bench!{find_seq_10_000, 10_000, BTreeMap}
+
+fn bench_iter(b: &mut Bencher, size: i32) {
+    let mut map = BTreeMap::<i32, i32>::new();
+    let mut rng = thread_rng();
+
+    for _ in 0..size {
+        map.insert(rng.gen(), rng.gen());
+    }
+
+    b.iter(|| {
+        for entry in &map {
+            black_box(entry);
+        }
+    });
+}
+
+#[bench]
+pub fn iter_20(b: &mut Bencher) {
+    bench_iter(b, 20);
+}
+
+#[bench]
+pub fn iter_1000(b: &mut Bencher) {
+    bench_iter(b, 1000);
+}
+
+#[bench]
+pub fn iter_100000(b: &mut Bencher) {
+    bench_iter(b, 100000);
+}
diff --git a/src/libcollections/benches/btree/mod.rs b/src/libcollections/benches/btree/mod.rs
new file mode 100644
index 00000000000..f436b0ac0c0
--- /dev/null
+++ b/src/libcollections/benches/btree/mod.rs
@@ -0,0 +1,11 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+mod map;
diff --git a/src/libcollections/benches/lib.rs b/src/libcollections/benches/lib.rs
new file mode 100644
index 00000000000..1a21db5e344
--- /dev/null
+++ b/src/libcollections/benches/lib.rs
@@ -0,0 +1,24 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![deny(warnings)]
+
+#![feature(rand)]
+#![feature(test)]
+
+extern crate test;
+
+mod btree;
+mod linked_list;
+mod string;
+mod str;
+mod slice;
+mod vec;
+mod vec_deque;
diff --git a/src/libcollections/benches/linked_list.rs b/src/libcollections/benches/linked_list.rs
new file mode 100644
index 00000000000..bbac44553f1
--- /dev/null
+++ b/src/libcollections/benches/linked_list.rs
@@ -0,0 +1,87 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::collections::LinkedList;
+use test::Bencher;
+
+#[bench]
+fn bench_collect_into(b: &mut Bencher) {
+    let v = &[0; 64];
+    b.iter(|| {
+        let _: LinkedList<_> = v.iter().cloned().collect();
+    })
+}
+
+#[bench]
+fn bench_push_front(b: &mut Bencher) {
+    let mut m: LinkedList<_> = LinkedList::new();
+    b.iter(|| {
+        m.push_front(0);
+    })
+}
+
+#[bench]
+fn bench_push_back(b: &mut Bencher) {
+    let mut m: LinkedList<_> = LinkedList::new();
+    b.iter(|| {
+        m.push_back(0);
+    })
+}
+
+#[bench]
+fn bench_push_back_pop_back(b: &mut Bencher) {
+    let mut m: LinkedList<_> = LinkedList::new();
+    b.iter(|| {
+        m.push_back(0);
+        m.pop_back();
+    })
+}
+
+#[bench]
+fn bench_push_front_pop_front(b: &mut Bencher) {
+    let mut m: LinkedList<_> = LinkedList::new();
+    b.iter(|| {
+        m.push_front(0);
+        m.pop_front();
+    })
+}
+
+#[bench]
+fn bench_iter(b: &mut Bencher) {
+    let v = &[0; 128];
+    let m: LinkedList<_> = v.iter().cloned().collect();
+    b.iter(|| {
+        assert!(m.iter().count() == 128);
+    })
+}
+#[bench]
+fn bench_iter_mut(b: &mut Bencher) {
+    let v = &[0; 128];
+    let mut m: LinkedList<_> = v.iter().cloned().collect();
+    b.iter(|| {
+        assert!(m.iter_mut().count() == 128);
+    })
+}
+#[bench]
+fn bench_iter_rev(b: &mut Bencher) {
+    let v = &[0; 128];
+    let m: LinkedList<_> = v.iter().cloned().collect();
+    b.iter(|| {
+        assert!(m.iter().rev().count() == 128);
+    })
+}
+#[bench]
+fn bench_iter_mut_rev(b: &mut Bencher) {
+    let v = &[0; 128];
+    let mut m: LinkedList<_> = v.iter().cloned().collect();
+    b.iter(|| {
+        assert!(m.iter_mut().rev().count() == 128);
+    })
+}
diff --git a/src/libcollections/benches/slice.rs b/src/libcollections/benches/slice.rs
new file mode 100644
index 00000000000..eb4b76509f9
--- /dev/null
+++ b/src/libcollections/benches/slice.rs
@@ -0,0 +1,280 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::{mem, ptr};
+use std::__rand::{Rng, thread_rng};
+
+use test::{Bencher, black_box};
+
+#[bench]
+fn iterator(b: &mut Bencher) {
+    // peculiar numbers to stop LLVM from optimising the summation
+    // out.
+    let v: Vec<_> = (0..100).map(|i| i ^ (i << 1) ^ (i >> 1)).collect();
+
+    b.iter(|| {
+        let mut sum = 0;
+        for x in &v {
+            sum += *x;
+        }
+        // sum == 11806, to stop dead code elimination.
+        if sum == 0 {
+            panic!()
+        }
+    })
+}
+
+#[bench]
+fn mut_iterator(b: &mut Bencher) {
+    let mut v = vec![0; 100];
+
+    b.iter(|| {
+        let mut i = 0;
+        for x in &mut v {
+            *x = i;
+            i += 1;
+        }
+    })
+}
+
+#[bench]
+fn concat(b: &mut Bencher) {
+    let xss: Vec<Vec<i32>> = (0..100).map(|i| (0..i).collect()).collect();
+    b.iter(|| {
+        xss.concat();
+    });
+}
+
+#[bench]
+fn join(b: &mut Bencher) {
+    let xss: Vec<Vec<i32>> = (0..100).map(|i| (0..i).collect()).collect();
+    b.iter(|| xss.join(&0));
+}
+
+#[bench]
+fn push(b: &mut Bencher) {
+    let mut vec = Vec::<i32>::new();
+    b.iter(|| {
+        vec.push(0);
+        black_box(&vec);
+    });
+}
+
+#[bench]
+fn starts_with_same_vector(b: &mut Bencher) {
+    let vec: Vec<_> = (0..100).collect();
+    b.iter(|| vec.starts_with(&vec))
+}
+
+#[bench]
+fn starts_with_single_element(b: &mut Bencher) {
+    let vec: Vec<_> = vec![0];
+    b.iter(|| vec.starts_with(&vec))
+}
+
+#[bench]
+fn starts_with_diff_one_element_at_end(b: &mut Bencher) {
+    let vec: Vec<_> = (0..100).collect();
+    let mut match_vec: Vec<_> = (0..99).collect();
+    match_vec.push(0);
+    b.iter(|| vec.starts_with(&match_vec))
+}
+
+#[bench]
+fn ends_with_same_vector(b: &mut Bencher) {
+    let vec: Vec<_> = (0..100).collect();
+    b.iter(|| vec.ends_with(&vec))
+}
+
+#[bench]
+fn ends_with_single_element(b: &mut Bencher) {
+    let vec: Vec<_> = vec![0];
+    b.iter(|| vec.ends_with(&vec))
+}
+
+#[bench]
+fn ends_with_diff_one_element_at_beginning(b: &mut Bencher) {
+    let vec: Vec<_> = (0..100).collect();
+    let mut match_vec: Vec<_> = (0..100).collect();
+    match_vec[0] = 200;
+    b.iter(|| vec.starts_with(&match_vec))
+}
+
+#[bench]
+fn contains_last_element(b: &mut Bencher) {
+    let vec: Vec<_> = (0..100).collect();
+    b.iter(|| vec.contains(&99))
+}
+
+#[bench]
+fn zero_1kb_from_elem(b: &mut Bencher) {
+    b.iter(|| vec![0u8; 1024]);
+}
+
+#[bench]
+fn zero_1kb_set_memory(b: &mut Bencher) {
+    b.iter(|| {
+        let mut v = Vec::<u8>::with_capacity(1024);
+        unsafe {
+            let vp = v.as_mut_ptr();
+            ptr::write_bytes(vp, 0, 1024);
+            v.set_len(1024);
+        }
+        v
+    });
+}
+
+#[bench]
+fn zero_1kb_loop_set(b: &mut Bencher) {
+    b.iter(|| {
+        let mut v = Vec::<u8>::with_capacity(1024);
+        unsafe {
+            v.set_len(1024);
+        }
+        for i in 0..1024 {
+            v[i] = 0;
+        }
+    });
+}
+
+#[bench]
+fn zero_1kb_mut_iter(b: &mut Bencher) {
+    b.iter(|| {
+        let mut v = Vec::<u8>::with_capacity(1024);
+        unsafe {
+            v.set_len(1024);
+        }
+        for x in &mut v {
+            *x = 0;
+        }
+        v
+    });
+}
+
+#[bench]
+fn random_inserts(b: &mut Bencher) {
+    let mut rng = thread_rng();
+    b.iter(|| {
+        let mut v = vec![(0, 0); 30];
+        for _ in 0..100 {
+            let l = v.len();
+            v.insert(rng.gen::<usize>() % (l + 1), (1, 1));
+        }
+    })
+}
+#[bench]
+fn random_removes(b: &mut Bencher) {
+    let mut rng = thread_rng();
+    b.iter(|| {
+        let mut v = vec![(0, 0); 130];
+        for _ in 0..100 {
+            let l = v.len();
+            v.remove(rng.gen::<usize>() % l);
+        }
+    })
+}
+
+fn gen_ascending(len: usize) -> Vec<u64> {
+    (0..len as u64).collect()
+}
+
+fn gen_descending(len: usize) -> Vec<u64> {
+    (0..len as u64).rev().collect()
+}
+
+fn gen_random(len: usize) -> Vec<u64> {
+    let mut rng = thread_rng();
+    rng.gen_iter::<u64>().take(len).collect()
+}
+
+fn gen_mostly_ascending(len: usize) -> Vec<u64> {
+    let mut rng = thread_rng();
+    let mut v = gen_ascending(len);
+    for _ in (0usize..).take_while(|x| x * x <= len) {
+        let x = rng.gen::<usize>() % len;
+        let y = rng.gen::<usize>() % len;
+        v.swap(x, y);
+    }
+    v
+}
+
+fn gen_mostly_descending(len: usize) -> Vec<u64> {
+    let mut rng = thread_rng();
+    let mut v = gen_descending(len);
+    for _ in (0usize..).take_while(|x| x * x <= len) {
+        let x = rng.gen::<usize>() % len;
+        let y = rng.gen::<usize>() % len;
+        v.swap(x, y);
+    }
+    v
+}
+
+fn gen_big_random(len: usize) -> Vec<[u64; 16]> {
+    let mut rng = thread_rng();
+    rng.gen_iter().map(|x| [x; 16]).take(len).collect()
+}
+
+fn gen_big_ascending(len: usize) -> Vec<[u64; 16]> {
+    (0..len as u64).map(|x| [x; 16]).take(len).collect()
+}
+
+fn gen_big_descending(len: usize) -> Vec<[u64; 16]> {
+    (0..len as u64).rev().map(|x| [x; 16]).take(len).collect()
+}
+
+macro_rules! sort_bench {
+    ($name:ident, $gen:expr, $len:expr) => {
+        #[bench]
+        fn $name(b: &mut Bencher) {
+            b.iter(|| $gen($len).sort());
+            b.bytes = $len * mem::size_of_val(&$gen(1)[0]) as u64;
+        }
+    }
+}
+
+sort_bench!(sort_small_random, gen_random, 10);
+sort_bench!(sort_small_ascending, gen_ascending, 10);
+sort_bench!(sort_small_descending, gen_descending, 10);
+
+sort_bench!(sort_small_big_random, gen_big_random, 10);
+sort_bench!(sort_small_big_ascending, gen_big_ascending, 10);
+sort_bench!(sort_small_big_descending, gen_big_descending, 10);
+
+sort_bench!(sort_medium_random, gen_random, 100);
+sort_bench!(sort_medium_ascending, gen_ascending, 100);
+sort_bench!(sort_medium_descending, gen_descending, 100);
+
+sort_bench!(sort_large_random, gen_random, 10000);
+sort_bench!(sort_large_ascending, gen_ascending, 10000);
+sort_bench!(sort_large_descending, gen_descending, 10000);
+sort_bench!(sort_large_mostly_ascending, gen_mostly_ascending, 10000);
+sort_bench!(sort_large_mostly_descending, gen_mostly_descending, 10000);
+
+sort_bench!(sort_large_big_random, gen_big_random, 10000);
+sort_bench!(sort_large_big_ascending, gen_big_ascending, 10000);
+sort_bench!(sort_large_big_descending, gen_big_descending, 10000);
+
+#[bench]
+fn sort_large_random_expensive(b: &mut Bencher) {
+    let len = 10000;
+    b.iter(|| {
+        let mut v = gen_random(len);
+        let mut count = 0;
+        v.sort_by(|a: &u64, b: &u64| {
+            count += 1;
+            if count % 1_000_000_000 == 0 {
+                panic!("should not happen");
+            }
+            (*a as f64).cos().partial_cmp(&(*b as f64).cos()).unwrap()
+        });
+        black_box(count);
+    });
+    b.bytes = len as u64 * mem::size_of::<u64>() as u64;
+}
\ No newline at end of file
diff --git a/src/libcollections/benches/str.rs b/src/libcollections/benches/str.rs
new file mode 100644
index 00000000000..7f727078101
--- /dev/null
+++ b/src/libcollections/benches/str.rs
@@ -0,0 +1,298 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use test::{Bencher, black_box};
+
+#[bench]
+fn char_iterator(b: &mut Bencher) {
+    let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
+
+    b.iter(|| s.chars().count());
+}
+
+#[bench]
+fn char_iterator_for(b: &mut Bencher) {
+    let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
+
+    b.iter(|| {
+        for ch in s.chars() { black_box(ch); }
+    });
+}
+
+#[bench]
+fn char_iterator_ascii(b: &mut Bencher) {
+    let s = "Mary had a little lamb, Little lamb
+    Mary had a little lamb, Little lamb
+    Mary had a little lamb, Little lamb
+    Mary had a little lamb, Little lamb
+    Mary had a little lamb, Little lamb
+    Mary had a little lamb, Little lamb";
+
+    b.iter(|| s.chars().count());
+}
+
+#[bench]
+fn char_iterator_rev(b: &mut Bencher) {
+    let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
+
+    b.iter(|| s.chars().rev().count());
+}
+
+#[bench]
+fn char_iterator_rev_for(b: &mut Bencher) {
+    let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
+
+    b.iter(|| {
+        for ch in s.chars().rev() { black_box(ch); }
+    });
+}
+
+#[bench]
+fn char_indicesator(b: &mut Bencher) {
+    let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
+    let len = s.chars().count();
+
+    b.iter(|| assert_eq!(s.char_indices().count(), len));
+}
+
+#[bench]
+fn char_indicesator_rev(b: &mut Bencher) {
+    let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
+    let len = s.chars().count();
+
+    b.iter(|| assert_eq!(s.char_indices().rev().count(), len));
+}
+
+#[bench]
+fn split_unicode_ascii(b: &mut Bencher) {
+    let s = "ประเทศไทย中华Việt Namประเทศไทย中华Việt Nam";
+
+    b.iter(|| assert_eq!(s.split('V').count(), 3));
+}
+
+#[bench]
+fn split_ascii(b: &mut Bencher) {
+    let s = "Mary had a little lamb, Little lamb, little-lamb.";
+    let len = s.split(' ').count();
+
+    b.iter(|| assert_eq!(s.split(' ').count(), len));
+}
+
+#[bench]
+fn split_extern_fn(b: &mut Bencher) {
+    let s = "Mary had a little lamb, Little lamb, little-lamb.";
+    let len = s.split(' ').count();
+    fn pred(c: char) -> bool { c == ' ' }
+
+    b.iter(|| assert_eq!(s.split(pred).count(), len));
+}
+
+#[bench]
+fn split_closure(b: &mut Bencher) {
+    let s = "Mary had a little lamb, Little lamb, little-lamb.";
+    let len = s.split(' ').count();
+
+    b.iter(|| assert_eq!(s.split(|c: char| c == ' ').count(), len));
+}
+
+#[bench]
+fn split_slice(b: &mut Bencher) {
+    let s = "Mary had a little lamb, Little lamb, little-lamb.";
+    let len = s.split(' ').count();
+
+    let c: &[char] = &[' '];
+    b.iter(|| assert_eq!(s.split(c).count(), len));
+}
+
+#[bench]
+fn bench_join(b: &mut Bencher) {
+    let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
+    let sep = "→";
+    let v = vec![s, s, s, s, s, s, s, s, s, s];
+    b.iter(|| {
+        assert_eq!(v.join(sep).len(), s.len() * 10 + sep.len() * 9);
+    })
+}
+
+#[bench]
+fn bench_contains_short_short(b: &mut Bencher) {
+    let haystack = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
+    let needle = "sit";
+
+    b.iter(|| {
+        assert!(haystack.contains(needle));
+    })
+}
+
+#[bench]
+fn bench_contains_short_long(b: &mut Bencher) {
+    let haystack = "\
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse quis lorem sit amet dolor \
+ultricies condimentum. Praesent iaculis purus elit, ac malesuada quam malesuada in. Duis sed orci \
+eros. Suspendisse sit amet magna mollis, mollis nunc luctus, imperdiet mi. Integer fringilla non \
+sem ut lacinia. Fusce varius tortor a risus porttitor hendrerit. Morbi mauris dui, ultricies nec \
+tempus vel, gravida nec quam.
+
+In est dui, tincidunt sed tempus interdum, adipiscing laoreet ante. Etiam tempor, tellus quis \
+sagittis interdum, nulla purus mattis sem, quis auctor erat odio ac tellus. In nec nunc sit amet \
+diam volutpat molestie at sed ipsum. Vestibulum laoreet consequat vulputate. Integer accumsan \
+lorem ac dignissim placerat. Suspendisse convallis faucibus lorem. Aliquam erat volutpat. In vel \
+eleifend felis. Sed suscipit nulla lorem, sed mollis est sollicitudin et. Nam fermentum egestas \
+interdum. Curabitur ut nisi justo.
+
+Sed sollicitudin ipsum tellus, ut condimentum leo eleifend nec. Cras ut velit ante. Phasellus nec \
+mollis odio. Mauris molestie erat in arcu mattis, at aliquet dolor vehicula. Quisque malesuada \
+lectus sit amet nisi pretium, a condimentum ipsum porta. Morbi at dapibus diam. Praesent egestas \
+est sed risus elementum, eu rutrum metus ultrices. Etiam fermentum consectetur magna, id rutrum \
+felis accumsan a. Aliquam ut pellentesque libero. Sed mi nulla, lobortis eu tortor id, suscipit \
+ultricies neque. Morbi iaculis sit amet risus at iaculis. Praesent eget ligula quis turpis \
+feugiat suscipit vel non arcu. Interdum et malesuada fames ac ante ipsum primis in faucibus. \
+Aliquam sit amet placerat lorem.
+
+Cras a lacus vel ante posuere elementum. Nunc est leo, bibendum ut facilisis vel, bibendum at \
+mauris. Nullam adipiscing diam vel odio ornare, luctus adipiscing mi luctus. Nulla facilisi. \
+Mauris adipiscing bibendum neque, quis adipiscing lectus tempus et. Sed feugiat erat et nisl \
+lobortis pharetra. Donec vitae erat enim. Nullam sit amet felis et quam lacinia tincidunt. Aliquam \
+suscipit dapibus urna. Sed volutpat urna in magna pulvinar volutpat. Phasellus nec tellus ac diam \
+cursus accumsan.
+
+Nam lectus enim, dapibus non nisi tempor, consectetur convallis massa. Maecenas eleifend dictum \
+feugiat. Etiam quis mauris vel risus luctus mattis a a nunc. Nullam orci quam, imperdiet id \
+vehicula in, porttitor ut nibh. Duis sagittis adipiscing nisl vitae congue. Donec mollis risus eu \
+leo suscipit, varius porttitor nulla porta. Pellentesque ut sem nec nisi euismod vehicula. Nulla \
+malesuada sollicitudin quam eu fermentum.";
+    let needle = "english";
+
+    b.iter(|| {
+        assert!(!haystack.contains(needle));
+    })
+}
+
+#[bench]
+fn bench_contains_bad_naive(b: &mut Bencher) {
+    let haystack = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
+    let needle = "aaaaaaaab";
+
+    b.iter(|| {
+        assert!(!haystack.contains(needle));
+    })
+}
+
+#[bench]
+fn bench_contains_equal(b: &mut Bencher) {
+    let haystack = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
+    let needle = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
+
+    b.iter(|| {
+        assert!(haystack.contains(needle));
+    })
+}
+
+macro_rules! make_test_inner {
+    ($s:ident, $code:expr, $name:ident, $str:expr) => {
+        #[bench]
+        fn $name(bencher: &mut Bencher) {
+            let mut $s = $str;
+            black_box(&mut $s);
+            bencher.iter(|| $code);
+        }
+    }
+}
+
+macro_rules! make_test {
+    ($name:ident, $s:ident, $code:expr) => {
+        mod $name {
+            use test::Bencher;
+            use test::black_box;
+
+            // Short strings: 65 bytes each
+            make_test_inner!($s, $code, short_ascii,
+                "Mary had a little lamb, Little lamb Mary had a littl lamb, lamb!");
+            make_test_inner!($s, $code, short_mixed,
+                "ศไทย中华Việt Nam; Mary had a little lamb, Little lam!");
+            make_test_inner!($s, $code, short_pile_of_poo,
+                "💩💩💩💩💩💩💩💩💩💩💩💩💩💩💩💩!");
+            make_test_inner!($s, $code, long_lorem_ipsum,"\
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse quis lorem sit amet dolor \
+ultricies condimentum. Praesent iaculis purus elit, ac malesuada quam malesuada in. Duis sed orci \
+eros. Suspendisse sit amet magna mollis, mollis nunc luctus, imperdiet mi. Integer fringilla non \
+sem ut lacinia. Fusce varius tortor a risus porttitor hendrerit. Morbi mauris dui, ultricies nec \
+tempus vel, gravida nec quam.
+
+In est dui, tincidunt sed tempus interdum, adipiscing laoreet ante. Etiam tempor, tellus quis \
+sagittis interdum, nulla purus mattis sem, quis auctor erat odio ac tellus. In nec nunc sit amet \
+diam volutpat molestie at sed ipsum. Vestibulum laoreet consequat vulputate. Integer accumsan \
+lorem ac dignissim placerat. Suspendisse convallis faucibus lorem. Aliquam erat volutpat. In vel \
+eleifend felis. Sed suscipit nulla lorem, sed mollis est sollicitudin et. Nam fermentum egestas \
+interdum. Curabitur ut nisi justo.
+
+Sed sollicitudin ipsum tellus, ut condimentum leo eleifend nec. Cras ut velit ante. Phasellus nec \
+mollis odio. Mauris molestie erat in arcu mattis, at aliquet dolor vehicula. Quisque malesuada \
+lectus sit amet nisi pretium, a condimentum ipsum porta. Morbi at dapibus diam. Praesent egestas \
+est sed risus elementum, eu rutrum metus ultrices. Etiam fermentum consectetur magna, id rutrum \
+felis accumsan a. Aliquam ut pellentesque libero. Sed mi nulla, lobortis eu tortor id, suscipit \
+ultricies neque. Morbi iaculis sit amet risus at iaculis. Praesent eget ligula quis turpis \
+feugiat suscipit vel non arcu. Interdum et malesuada fames ac ante ipsum primis in faucibus. \
+Aliquam sit amet placerat lorem.
+
+Cras a lacus vel ante posuere elementum. Nunc est leo, bibendum ut facilisis vel, bibendum at \
+mauris. Nullam adipiscing diam vel odio ornare, luctus adipiscing mi luctus. Nulla facilisi. \
+Mauris adipiscing bibendum neque, quis adipiscing lectus tempus et. Sed feugiat erat et nisl \
+lobortis pharetra. Donec vitae erat enim. Nullam sit amet felis et quam lacinia tincidunt. Aliquam \
+suscipit dapibus urna. Sed volutpat urna in magna pulvinar volutpat. Phasellus nec tellus ac diam \
+cursus accumsan.
+
+Nam lectus enim, dapibus non nisi tempor, consectetur convallis massa. Maecenas eleifend dictum \
+feugiat. Etiam quis mauris vel risus luctus mattis a a nunc. Nullam orci quam, imperdiet id \
+vehicula in, porttitor ut nibh. Duis sagittis adipiscing nisl vitae congue. Donec mollis risus eu \
+leo suscipit, varius porttitor nulla porta. Pellentesque ut sem nec nisi euismod vehicula. Nulla \
+malesuada sollicitudin quam eu fermentum!");
+        }
+    }
+}
+
+make_test!(chars_count, s, s.chars().count());
+
+make_test!(contains_bang_str, s, s.contains("!"));
+make_test!(contains_bang_char, s, s.contains('!'));
+
+make_test!(match_indices_a_str, s, s.match_indices("a").count());
+
+make_test!(split_a_str, s, s.split("a").count());
+
+make_test!(trim_ascii_char, s, {
+    use std::ascii::AsciiExt;
+    s.trim_matches(|c: char| c.is_ascii())
+});
+make_test!(trim_left_ascii_char, s, {
+    use std::ascii::AsciiExt;
+    s.trim_left_matches(|c: char| c.is_ascii())
+});
+make_test!(trim_right_ascii_char, s, {
+    use std::ascii::AsciiExt;
+    s.trim_right_matches(|c: char| c.is_ascii())
+});
+
+make_test!(find_underscore_char, s, s.find('_'));
+make_test!(rfind_underscore_char, s, s.rfind('_'));
+make_test!(find_underscore_str, s, s.find("_"));
+
+make_test!(find_zzz_char, s, s.find('\u{1F4A4}'));
+make_test!(rfind_zzz_char, s, s.rfind('\u{1F4A4}'));
+make_test!(find_zzz_str, s, s.find("\u{1F4A4}"));
+
+make_test!(split_space_char, s, s.split(' ').count());
+make_test!(split_terminator_space_char, s, s.split_terminator(' ').count());
+
+make_test!(splitn_space_char, s, s.splitn(10, ' ').count());
+make_test!(rsplitn_space_char, s, s.rsplitn(10, ' ').count());
+
+make_test!(split_space_str, s, s.split(" ").count());
+make_test!(split_ad_str, s, s.split("ad").count());
diff --git a/src/libcollections/benches/string.rs b/src/libcollections/benches/string.rs
new file mode 100644
index 00000000000..36be21d978e
--- /dev/null
+++ b/src/libcollections/benches/string.rs
@@ -0,0 +1,134 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::iter::repeat;
+use test::Bencher;
+
+#[bench]
+fn bench_with_capacity(b: &mut Bencher) {
+    b.iter(|| String::with_capacity(100));
+}
+
+#[bench]
+fn bench_push_str(b: &mut Bencher) {
+    let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
+    b.iter(|| {
+        let mut r = String::new();
+        r.push_str(s);
+    });
+}
+
+const REPETITIONS: u64 = 10_000;
+
+#[bench]
+fn bench_push_str_one_byte(b: &mut Bencher) {
+    b.bytes = REPETITIONS;
+    b.iter(|| {
+        let mut r = String::new();
+        for _ in 0..REPETITIONS {
+            r.push_str("a")
+        }
+    });
+}
+
+#[bench]
+fn bench_push_char_one_byte(b: &mut Bencher) {
+    b.bytes = REPETITIONS;
+    b.iter(|| {
+        let mut r = String::new();
+        for _ in 0..REPETITIONS {
+            r.push('a')
+        }
+    });
+}
+
+#[bench]
+fn bench_push_char_two_bytes(b: &mut Bencher) {
+    b.bytes = REPETITIONS * 2;
+    b.iter(|| {
+        let mut r = String::new();
+        for _ in 0..REPETITIONS {
+            r.push('â')
+        }
+    });
+}
+
+#[bench]
+fn from_utf8_lossy_100_ascii(b: &mut Bencher) {
+    let s = b"Hello there, the quick brown fox jumped over the lazy dog! \
+              Lorem ipsum dolor sit amet, consectetur. ";
+
+    assert_eq!(100, s.len());
+    b.iter(|| {
+        let _ = String::from_utf8_lossy(s);
+    });
+}
+
+#[bench]
+fn from_utf8_lossy_100_multibyte(b: &mut Bencher) {
+    let s = "𐌀𐌖𐌋𐌄𐌑𐌉ปรدولة الكويتทศไทย中华𐍅𐌿𐌻𐍆𐌹𐌻𐌰".as_bytes();
+    assert_eq!(100, s.len());
+    b.iter(|| {
+        let _ = String::from_utf8_lossy(s);
+    });
+}
+
+#[bench]
+fn from_utf8_lossy_invalid(b: &mut Bencher) {
+    let s = b"Hello\xC0\x80 There\xE6\x83 Goodbye";
+    b.iter(|| {
+        let _ = String::from_utf8_lossy(s);
+    });
+}
+
+#[bench]
+fn from_utf8_lossy_100_invalid(b: &mut Bencher) {
+    let s = repeat(0xf5).take(100).collect::<Vec<_>>();
+    b.iter(|| {
+        let _ = String::from_utf8_lossy(&s);
+    });
+}
+
+#[bench]
+fn bench_exact_size_shrink_to_fit(b: &mut Bencher) {
+    let s = "Hello there, the quick brown fox jumped over the lazy dog! \
+             Lorem ipsum dolor sit amet, consectetur. ";
+    // ensure our operation produces an exact-size string before we benchmark it
+    let mut r = String::with_capacity(s.len());
+    r.push_str(s);
+    assert_eq!(r.len(), r.capacity());
+    b.iter(|| {
+        let mut r = String::with_capacity(s.len());
+        r.push_str(s);
+        r.shrink_to_fit();
+        r
+    });
+}
+
+#[bench]
+fn bench_from_str(b: &mut Bencher) {
+    let s = "Hello there, the quick brown fox jumped over the lazy dog! \
+             Lorem ipsum dolor sit amet, consectetur. ";
+    b.iter(|| String::from(s))
+}
+
+#[bench]
+fn bench_from(b: &mut Bencher) {
+    let s = "Hello there, the quick brown fox jumped over the lazy dog! \
+             Lorem ipsum dolor sit amet, consectetur. ";
+    b.iter(|| String::from(s))
+}
+
+#[bench]
+fn bench_to_string(b: &mut Bencher) {
+    let s = "Hello there, the quick brown fox jumped over the lazy dog! \
+             Lorem ipsum dolor sit amet, consectetur. ";
+    b.iter(|| s.to_string())
+}
diff --git a/src/libcollections/benches/vec.rs b/src/libcollections/benches/vec.rs
new file mode 100644
index 00000000000..41490117068
--- /dev/null
+++ b/src/libcollections/benches/vec.rs
@@ -0,0 +1,492 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use test::Bencher;
+use std::iter::{FromIterator, repeat};
+
+#[bench]
+fn bench_new(b: &mut Bencher) {
+    b.iter(|| {
+        let v: Vec<u32> = Vec::new();
+        assert_eq!(v.len(), 0);
+        assert_eq!(v.capacity(), 0);
+    })
+}
+
+fn do_bench_with_capacity(b: &mut Bencher, src_len: usize) {
+    b.bytes = src_len as u64;
+
+    b.iter(|| {
+        let v: Vec<u32> = Vec::with_capacity(src_len);
+        assert_eq!(v.len(), 0);
+        assert_eq!(v.capacity(), src_len);
+    })
+}
+
+#[bench]
+fn bench_with_capacity_0000(b: &mut Bencher) {
+    do_bench_with_capacity(b, 0)
+}
+
+#[bench]
+fn bench_with_capacity_0010(b: &mut Bencher) {
+    do_bench_with_capacity(b, 10)
+}
+
+#[bench]
+fn bench_with_capacity_0100(b: &mut Bencher) {
+    do_bench_with_capacity(b, 100)
+}
+
+#[bench]
+fn bench_with_capacity_1000(b: &mut Bencher) {
+    do_bench_with_capacity(b, 1000)
+}
+
+fn do_bench_from_fn(b: &mut Bencher, src_len: usize) {
+    b.bytes = src_len as u64;
+
+    b.iter(|| {
+        let dst = (0..src_len).collect::<Vec<_>>();
+        assert_eq!(dst.len(), src_len);
+        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
+    })
+}
+
+#[bench]
+fn bench_from_fn_0000(b: &mut Bencher) {
+    do_bench_from_fn(b, 0)
+}
+
+#[bench]
+fn bench_from_fn_0010(b: &mut Bencher) {
+    do_bench_from_fn(b, 10)
+}
+
+#[bench]
+fn bench_from_fn_0100(b: &mut Bencher) {
+    do_bench_from_fn(b, 100)
+}
+
+#[bench]
+fn bench_from_fn_1000(b: &mut Bencher) {
+    do_bench_from_fn(b, 1000)
+}
+
+fn do_bench_from_elem(b: &mut Bencher, src_len: usize) {
+    b.bytes = src_len as u64;
+
+    b.iter(|| {
+        let dst: Vec<usize> = repeat(5).take(src_len).collect();
+        assert_eq!(dst.len(), src_len);
+        assert!(dst.iter().all(|x| *x == 5));
+    })
+}
+
+#[bench]
+fn bench_from_elem_0000(b: &mut Bencher) {
+    do_bench_from_elem(b, 0)
+}
+
+#[bench]
+fn bench_from_elem_0010(b: &mut Bencher) {
+    do_bench_from_elem(b, 10)
+}
+
+#[bench]
+fn bench_from_elem_0100(b: &mut Bencher) {
+    do_bench_from_elem(b, 100)
+}
+
+#[bench]
+fn bench_from_elem_1000(b: &mut Bencher) {
+    do_bench_from_elem(b, 1000)
+}
+
+fn do_bench_from_slice(b: &mut Bencher, src_len: usize) {
+    let src: Vec<_> = FromIterator::from_iter(0..src_len);
+
+    b.bytes = src_len as u64;
+
+    b.iter(|| {
+        let dst = src.clone()[..].to_vec();
+        assert_eq!(dst.len(), src_len);
+        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
+    });
+}
+
+#[bench]
+fn bench_from_slice_0000(b: &mut Bencher) {
+    do_bench_from_slice(b, 0)
+}
+
+#[bench]
+fn bench_from_slice_0010(b: &mut Bencher) {
+    do_bench_from_slice(b, 10)
+}
+
+#[bench]
+fn bench_from_slice_0100(b: &mut Bencher) {
+    do_bench_from_slice(b, 100)
+}
+
+#[bench]
+fn bench_from_slice_1000(b: &mut Bencher) {
+    do_bench_from_slice(b, 1000)
+}
+
+fn do_bench_from_iter(b: &mut Bencher, src_len: usize) {
+    let src: Vec<_> = FromIterator::from_iter(0..src_len);
+
+    b.bytes = src_len as u64;
+
+    b.iter(|| {
+        let dst: Vec<_> = FromIterator::from_iter(src.clone());
+        assert_eq!(dst.len(), src_len);
+        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
+    });
+}
+
+#[bench]
+fn bench_from_iter_0000(b: &mut Bencher) {
+    do_bench_from_iter(b, 0)
+}
+
+#[bench]
+fn bench_from_iter_0010(b: &mut Bencher) {
+    do_bench_from_iter(b, 10)
+}
+
+#[bench]
+fn bench_from_iter_0100(b: &mut Bencher) {
+    do_bench_from_iter(b, 100)
+}
+
+#[bench]
+fn bench_from_iter_1000(b: &mut Bencher) {
+    do_bench_from_iter(b, 1000)
+}
+
+fn do_bench_extend(b: &mut Bencher, dst_len: usize, src_len: usize) {
+    let dst: Vec<_> = FromIterator::from_iter(0..dst_len);
+    let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
+
+    b.bytes = src_len as u64;
+
+    b.iter(|| {
+        let mut dst = dst.clone();
+        dst.extend(src.clone());
+        assert_eq!(dst.len(), dst_len + src_len);
+        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
+    });
+}
+
+#[bench]
+fn bench_extend_0000_0000(b: &mut Bencher) {
+    do_bench_extend(b, 0, 0)
+}
+
+#[bench]
+fn bench_extend_0000_0010(b: &mut Bencher) {
+    do_bench_extend(b, 0, 10)
+}
+
+#[bench]
+fn bench_extend_0000_0100(b: &mut Bencher) {
+    do_bench_extend(b, 0, 100)
+}
+
+#[bench]
+fn bench_extend_0000_1000(b: &mut Bencher) {
+    do_bench_extend(b, 0, 1000)
+}
+
+#[bench]
+fn bench_extend_0010_0010(b: &mut Bencher) {
+    do_bench_extend(b, 10, 10)
+}
+
+#[bench]
+fn bench_extend_0100_0100(b: &mut Bencher) {
+    do_bench_extend(b, 100, 100)
+}
+
+#[bench]
+fn bench_extend_1000_1000(b: &mut Bencher) {
+    do_bench_extend(b, 1000, 1000)
+}
+
+fn do_bench_push_all(b: &mut Bencher, dst_len: usize, src_len: usize) {
+    let dst: Vec<_> = FromIterator::from_iter(0..dst_len);
+    let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
+
+    b.bytes = src_len as u64;
+
+    b.iter(|| {
+        let mut dst = dst.clone();
+        dst.extend_from_slice(&src);
+        assert_eq!(dst.len(), dst_len + src_len);
+        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
+    });
+}
+
+#[bench]
+fn bench_push_all_0000_0000(b: &mut Bencher) {
+    do_bench_push_all(b, 0, 0)
+}
+
+#[bench]
+fn bench_push_all_0000_0010(b: &mut Bencher) {
+    do_bench_push_all(b, 0, 10)
+}
+
+#[bench]
+fn bench_push_all_0000_0100(b: &mut Bencher) {
+    do_bench_push_all(b, 0, 100)
+}
+
+#[bench]
+fn bench_push_all_0000_1000(b: &mut Bencher) {
+    do_bench_push_all(b, 0, 1000)
+}
+
+#[bench]
+fn bench_push_all_0010_0010(b: &mut Bencher) {
+    do_bench_push_all(b, 10, 10)
+}
+
+#[bench]
+fn bench_push_all_0100_0100(b: &mut Bencher) {
+    do_bench_push_all(b, 100, 100)
+}
+
+#[bench]
+fn bench_push_all_1000_1000(b: &mut Bencher) {
+    do_bench_push_all(b, 1000, 1000)
+}
+
+fn do_bench_push_all_move(b: &mut Bencher, dst_len: usize, src_len: usize) {
+    let dst: Vec<_> = FromIterator::from_iter(0..dst_len);
+    let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
+
+    b.bytes = src_len as u64;
+
+    b.iter(|| {
+        let mut dst = dst.clone();
+        dst.extend(src.clone());
+        assert_eq!(dst.len(), dst_len + src_len);
+        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
+    });
+}
+
+#[bench]
+fn bench_push_all_move_0000_0000(b: &mut Bencher) {
+    do_bench_push_all_move(b, 0, 0)
+}
+
+#[bench]
+fn bench_push_all_move_0000_0010(b: &mut Bencher) {
+    do_bench_push_all_move(b, 0, 10)
+}
+
+#[bench]
+fn bench_push_all_move_0000_0100(b: &mut Bencher) {
+    do_bench_push_all_move(b, 0, 100)
+}
+
+#[bench]
+fn bench_push_all_move_0000_1000(b: &mut Bencher) {
+    do_bench_push_all_move(b, 0, 1000)
+}
+
+#[bench]
+fn bench_push_all_move_0010_0010(b: &mut Bencher) {
+    do_bench_push_all_move(b, 10, 10)
+}
+
+#[bench]
+fn bench_push_all_move_0100_0100(b: &mut Bencher) {
+    do_bench_push_all_move(b, 100, 100)
+}
+
+#[bench]
+fn bench_push_all_move_1000_1000(b: &mut Bencher) {
+    do_bench_push_all_move(b, 1000, 1000)
+}
+
+fn do_bench_clone(b: &mut Bencher, src_len: usize) {
+    let src: Vec<usize> = FromIterator::from_iter(0..src_len);
+
+    b.bytes = src_len as u64;
+
+    b.iter(|| {
+        let dst = src.clone();
+        assert_eq!(dst.len(), src_len);
+        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
+    });
+}
+
+#[bench]
+fn bench_clone_0000(b: &mut Bencher) {
+    do_bench_clone(b, 0)
+}
+
+#[bench]
+fn bench_clone_0010(b: &mut Bencher) {
+    do_bench_clone(b, 10)
+}
+
+#[bench]
+fn bench_clone_0100(b: &mut Bencher) {
+    do_bench_clone(b, 100)
+}
+
+#[bench]
+fn bench_clone_1000(b: &mut Bencher) {
+    do_bench_clone(b, 1000)
+}
+
+fn do_bench_clone_from(b: &mut Bencher, times: usize, dst_len: usize, src_len: usize) {
+    let dst: Vec<_> = FromIterator::from_iter(0..src_len);
+    let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
+
+    b.bytes = (times * src_len) as u64;
+
+    b.iter(|| {
+        let mut dst = dst.clone();
+
+        for _ in 0..times {
+            dst.clone_from(&src);
+
+            assert_eq!(dst.len(), src_len);
+            assert!(dst.iter().enumerate().all(|(i, x)| dst_len + i == *x));
+        }
+    });
+}
+
+#[bench]
+fn bench_clone_from_01_0000_0000(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 0, 0)
+}
+
+#[bench]
+fn bench_clone_from_01_0000_0010(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 0, 10)
+}
+
+#[bench]
+fn bench_clone_from_01_0000_0100(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 0, 100)
+}
+
+#[bench]
+fn bench_clone_from_01_0000_1000(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 0, 1000)
+}
+
+#[bench]
+fn bench_clone_from_01_0010_0010(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 10, 10)
+}
+
+#[bench]
+fn bench_clone_from_01_0100_0100(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 100, 100)
+}
+
+#[bench]
+fn bench_clone_from_01_1000_1000(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 1000, 1000)
+}
+
+#[bench]
+fn bench_clone_from_01_0010_0100(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 10, 100)
+}
+
+#[bench]
+fn bench_clone_from_01_0100_1000(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 100, 1000)
+}
+
+#[bench]
+fn bench_clone_from_01_0010_0000(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 10, 0)
+}
+
+#[bench]
+fn bench_clone_from_01_0100_0010(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 100, 10)
+}
+
+#[bench]
+fn bench_clone_from_01_1000_0100(b: &mut Bencher) {
+    do_bench_clone_from(b, 1, 1000, 100)
+}
+
+#[bench]
+fn bench_clone_from_10_0000_0000(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 0, 0)
+}
+
+#[bench]
+fn bench_clone_from_10_0000_0010(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 0, 10)
+}
+
+#[bench]
+fn bench_clone_from_10_0000_0100(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 0, 100)
+}
+
+#[bench]
+fn bench_clone_from_10_0000_1000(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 0, 1000)
+}
+
+#[bench]
+fn bench_clone_from_10_0010_0010(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 10, 10)
+}
+
+#[bench]
+fn bench_clone_from_10_0100_0100(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 100, 100)
+}
+
+#[bench]
+fn bench_clone_from_10_1000_1000(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 1000, 1000)
+}
+
+#[bench]
+fn bench_clone_from_10_0010_0100(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 10, 100)
+}
+
+#[bench]
+fn bench_clone_from_10_0100_1000(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 100, 1000)
+}
+
+#[bench]
+fn bench_clone_from_10_0010_0000(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 10, 0)
+}
+
+#[bench]
+fn bench_clone_from_10_0100_0010(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 100, 10)
+}
+
+#[bench]
+fn bench_clone_from_10_1000_0100(b: &mut Bencher) {
+    do_bench_clone_from(b, 10, 1000, 100)
+}
diff --git a/src/libcollections/benches/vec_deque.rs b/src/libcollections/benches/vec_deque.rs
new file mode 100644
index 00000000000..380645e7cd0
--- /dev/null
+++ b/src/libcollections/benches/vec_deque.rs
@@ -0,0 +1,57 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+use std::collections::VecDeque;
+use test::{Bencher, black_box};
+
+#[bench]
+fn bench_new(b: &mut Bencher) {
+    b.iter(|| {
+        let ring: VecDeque<i32> = VecDeque::new();
+        black_box(ring);
+    })
+}
+
+#[bench]
+fn bench_grow_1025(b: &mut Bencher) {
+    b.iter(|| {
+        let mut deq = VecDeque::new();
+        for i in 0..1025 {
+            deq.push_front(i);
+        }
+        black_box(deq);
+    })
+}
+
+#[bench]
+fn bench_iter_1000(b: &mut Bencher) {
+    let ring: VecDeque<_> = (0..1000).collect();
+
+    b.iter(|| {
+        let mut sum = 0;
+        for &i in &ring {
+            sum += i;
+        }
+        black_box(sum);
+    })
+}
+
+#[bench]
+fn bench_mut_iter_1000(b: &mut Bencher) {
+    let mut ring: VecDeque<_> = (0..1000).collect();
+
+    b.iter(|| {
+        let mut sum = 0;
+        for i in &mut ring {
+            sum += *i;
+        }
+        black_box(sum);
+    })
+}
diff --git a/src/libcollectionstest/btree/map.rs b/src/libcollectionstest/btree/map.rs
index c84753415a2..11be13426e4 100644
--- a/src/libcollectionstest/btree/map.rs
+++ b/src/libcollectionstest/btree/map.rs
@@ -606,52 +606,3 @@ fn test_split_off_large_random_sorted() {
     assert!(map.into_iter().eq(data.clone().into_iter().filter(|x| x.0 < key)));
     assert!(right.into_iter().eq(data.into_iter().filter(|x| x.0 >= key)));
 }
-
-mod bench {
-    use std::collections::BTreeMap;
-    use std::__rand::{Rng, thread_rng};
-
-    use test::{Bencher, black_box};
-
-    map_insert_rand_bench!{insert_rand_100,    100,    BTreeMap}
-    map_insert_rand_bench!{insert_rand_10_000, 10_000, BTreeMap}
-
-    map_insert_seq_bench!{insert_seq_100,    100,    BTreeMap}
-    map_insert_seq_bench!{insert_seq_10_000, 10_000, BTreeMap}
-
-    map_find_rand_bench!{find_rand_100,    100,    BTreeMap}
-    map_find_rand_bench!{find_rand_10_000, 10_000, BTreeMap}
-
-    map_find_seq_bench!{find_seq_100,    100,    BTreeMap}
-    map_find_seq_bench!{find_seq_10_000, 10_000, BTreeMap}
-
-    fn bench_iter(b: &mut Bencher, size: i32) {
-        let mut map = BTreeMap::<i32, i32>::new();
-        let mut rng = thread_rng();
-
-        for _ in 0..size {
-            map.insert(rng.gen(), rng.gen());
-        }
-
-        b.iter(|| {
-            for entry in &map {
-                black_box(entry);
-            }
-        });
-    }
-
-    #[bench]
-    pub fn iter_20(b: &mut Bencher) {
-        bench_iter(b, 20);
-    }
-
-    #[bench]
-    pub fn iter_1000(b: &mut Bencher) {
-        bench_iter(b, 1000);
-    }
-
-    #[bench]
-    pub fn iter_100000(b: &mut Bencher) {
-        bench_iter(b, 100000);
-    }
-}
diff --git a/src/libcollectionstest/lib.rs b/src/libcollectionstest/lib.rs
index b146672893f..57e3c2df059 100644
--- a/src/libcollectionstest/lib.rs
+++ b/src/libcollectionstest/lib.rs
@@ -35,10 +35,6 @@ extern crate std_unicode;
 use std::hash::{Hash, Hasher};
 use std::collections::hash_map::DefaultHasher;
 
-#[cfg(test)]
-#[macro_use]
-mod bench;
-
 mod binary_heap;
 mod btree;
 mod cow_str;
diff --git a/src/libcollectionstest/linked_list.rs b/src/libcollectionstest/linked_list.rs
index 956d75a95a5..a59724a017b 100644
--- a/src/libcollectionstest/linked_list.rs
+++ b/src/libcollectionstest/linked_list.rs
@@ -10,8 +10,6 @@
 
 use std::collections::LinkedList;
 
-use test;
-
 #[test]
 fn test_basic() {
     let mut m = LinkedList::<Box<_>>::new();
@@ -356,81 +354,6 @@ fn test_extend() {
     assert!(a.iter().eq(&[1, 2, 3, 4, 5, 6, 7]));
 }
 
-#[bench]
-fn bench_collect_into(b: &mut test::Bencher) {
-    let v = &[0; 64];
-    b.iter(|| {
-        let _: LinkedList<_> = v.iter().cloned().collect();
-    })
-}
-
-#[bench]
-fn bench_push_front(b: &mut test::Bencher) {
-    let mut m: LinkedList<_> = LinkedList::new();
-    b.iter(|| {
-        m.push_front(0);
-    })
-}
-
-#[bench]
-fn bench_push_back(b: &mut test::Bencher) {
-    let mut m: LinkedList<_> = LinkedList::new();
-    b.iter(|| {
-        m.push_back(0);
-    })
-}
-
-#[bench]
-fn bench_push_back_pop_back(b: &mut test::Bencher) {
-    let mut m: LinkedList<_> = LinkedList::new();
-    b.iter(|| {
-        m.push_back(0);
-        m.pop_back();
-    })
-}
-
-#[bench]
-fn bench_push_front_pop_front(b: &mut test::Bencher) {
-    let mut m: LinkedList<_> = LinkedList::new();
-    b.iter(|| {
-        m.push_front(0);
-        m.pop_front();
-    })
-}
-
-#[bench]
-fn bench_iter(b: &mut test::Bencher) {
-    let v = &[0; 128];
-    let m: LinkedList<_> = v.iter().cloned().collect();
-    b.iter(|| {
-        assert!(m.iter().count() == 128);
-    })
-}
-#[bench]
-fn bench_iter_mut(b: &mut test::Bencher) {
-    let v = &[0; 128];
-    let mut m: LinkedList<_> = v.iter().cloned().collect();
-    b.iter(|| {
-        assert!(m.iter_mut().count() == 128);
-    })
-}
-#[bench]
-fn bench_iter_rev(b: &mut test::Bencher) {
-    let v = &[0; 128];
-    let m: LinkedList<_> = v.iter().cloned().collect();
-    b.iter(|| {
-        assert!(m.iter().rev().count() == 128);
-    })
-}
-#[bench]
-fn bench_iter_mut_rev(b: &mut test::Bencher) {
-    let v = &[0; 128];
-    let mut m: LinkedList<_> = v.iter().cloned().collect();
-    b.iter(|| {
-        assert!(m.iter_mut().rev().count() == 128);
-    })
-}
-
 #[test]
 fn test_contains() {
     let mut l = LinkedList::new();
diff --git a/src/libcollectionstest/slice.rs b/src/libcollectionstest/slice.rs
index b9dec6be7b8..a7f7baf3851 100644
--- a/src/libcollectionstest/slice.rs
+++ b/src/libcollectionstest/slice.rs
@@ -1170,276 +1170,3 @@ fn test_copy_from_slice_dst_shorter() {
     let mut dst = [0; 3];
     dst.copy_from_slice(&src);
 }
-
-mod bench {
-    use std::{mem, ptr};
-    use std::__rand::{Rng, thread_rng};
-
-    use test::{Bencher, black_box};
-
-    #[bench]
-    fn iterator(b: &mut Bencher) {
-        // peculiar numbers to stop LLVM from optimising the summation
-        // out.
-        let v: Vec<_> = (0..100).map(|i| i ^ (i << 1) ^ (i >> 1)).collect();
-
-        b.iter(|| {
-            let mut sum = 0;
-            for x in &v {
-                sum += *x;
-            }
-            // sum == 11806, to stop dead code elimination.
-            if sum == 0 {
-                panic!()
-            }
-        })
-    }
-
-    #[bench]
-    fn mut_iterator(b: &mut Bencher) {
-        let mut v = vec![0; 100];
-
-        b.iter(|| {
-            let mut i = 0;
-            for x in &mut v {
-                *x = i;
-                i += 1;
-            }
-        })
-    }
-
-    #[bench]
-    fn concat(b: &mut Bencher) {
-        let xss: Vec<Vec<i32>> = (0..100).map(|i| (0..i).collect()).collect();
-        b.iter(|| {
-            xss.concat();
-        });
-    }
-
-    #[bench]
-    fn join(b: &mut Bencher) {
-        let xss: Vec<Vec<i32>> = (0..100).map(|i| (0..i).collect()).collect();
-        b.iter(|| xss.join(&0));
-    }
-
-    #[bench]
-    fn push(b: &mut Bencher) {
-        let mut vec = Vec::<i32>::new();
-        b.iter(|| {
-            vec.push(0);
-            black_box(&vec);
-        });
-    }
-
-    #[bench]
-    fn starts_with_same_vector(b: &mut Bencher) {
-        let vec: Vec<_> = (0..100).collect();
-        b.iter(|| vec.starts_with(&vec))
-    }
-
-    #[bench]
-    fn starts_with_single_element(b: &mut Bencher) {
-        let vec: Vec<_> = vec![0];
-        b.iter(|| vec.starts_with(&vec))
-    }
-
-    #[bench]
-    fn starts_with_diff_one_element_at_end(b: &mut Bencher) {
-        let vec: Vec<_> = (0..100).collect();
-        let mut match_vec: Vec<_> = (0..99).collect();
-        match_vec.push(0);
-        b.iter(|| vec.starts_with(&match_vec))
-    }
-
-    #[bench]
-    fn ends_with_same_vector(b: &mut Bencher) {
-        let vec: Vec<_> = (0..100).collect();
-        b.iter(|| vec.ends_with(&vec))
-    }
-
-    #[bench]
-    fn ends_with_single_element(b: &mut Bencher) {
-        let vec: Vec<_> = vec![0];
-        b.iter(|| vec.ends_with(&vec))
-    }
-
-    #[bench]
-    fn ends_with_diff_one_element_at_beginning(b: &mut Bencher) {
-        let vec: Vec<_> = (0..100).collect();
-        let mut match_vec: Vec<_> = (0..100).collect();
-        match_vec[0] = 200;
-        b.iter(|| vec.starts_with(&match_vec))
-    }
-
-    #[bench]
-    fn contains_last_element(b: &mut Bencher) {
-        let vec: Vec<_> = (0..100).collect();
-        b.iter(|| vec.contains(&99))
-    }
-
-    #[bench]
-    fn zero_1kb_from_elem(b: &mut Bencher) {
-        b.iter(|| vec![0u8; 1024]);
-    }
-
-    #[bench]
-    fn zero_1kb_set_memory(b: &mut Bencher) {
-        b.iter(|| {
-            let mut v = Vec::<u8>::with_capacity(1024);
-            unsafe {
-                let vp = v.as_mut_ptr();
-                ptr::write_bytes(vp, 0, 1024);
-                v.set_len(1024);
-            }
-            v
-        });
-    }
-
-    #[bench]
-    fn zero_1kb_loop_set(b: &mut Bencher) {
-        b.iter(|| {
-            let mut v = Vec::<u8>::with_capacity(1024);
-            unsafe {
-                v.set_len(1024);
-            }
-            for i in 0..1024 {
-                v[i] = 0;
-            }
-        });
-    }
-
-    #[bench]
-    fn zero_1kb_mut_iter(b: &mut Bencher) {
-        b.iter(|| {
-            let mut v = Vec::<u8>::with_capacity(1024);
-            unsafe {
-                v.set_len(1024);
-            }
-            for x in &mut v {
-                *x = 0;
-            }
-            v
-        });
-    }
-
-    #[bench]
-    fn random_inserts(b: &mut Bencher) {
-        let mut rng = thread_rng();
-        b.iter(|| {
-            let mut v = vec![(0, 0); 30];
-            for _ in 0..100 {
-                let l = v.len();
-                v.insert(rng.gen::<usize>() % (l + 1), (1, 1));
-            }
-        })
-    }
-    #[bench]
-    fn random_removes(b: &mut Bencher) {
-        let mut rng = thread_rng();
-        b.iter(|| {
-            let mut v = vec![(0, 0); 130];
-            for _ in 0..100 {
-                let l = v.len();
-                v.remove(rng.gen::<usize>() % l);
-            }
-        })
-    }
-
-    fn gen_ascending(len: usize) -> Vec<u64> {
-        (0..len as u64).collect()
-    }
-
-    fn gen_descending(len: usize) -> Vec<u64> {
-        (0..len as u64).rev().collect()
-    }
-
-    fn gen_random(len: usize) -> Vec<u64> {
-        let mut rng = thread_rng();
-        rng.gen_iter::<u64>().take(len).collect()
-    }
-
-    fn gen_mostly_ascending(len: usize) -> Vec<u64> {
-        let mut rng = thread_rng();
-        let mut v = gen_ascending(len);
-        for _ in (0usize..).take_while(|x| x * x <= len) {
-            let x = rng.gen::<usize>() % len;
-            let y = rng.gen::<usize>() % len;
-            v.swap(x, y);
-        }
-        v
-    }
-
-    fn gen_mostly_descending(len: usize) -> Vec<u64> {
-        let mut rng = thread_rng();
-        let mut v = gen_descending(len);
-        for _ in (0usize..).take_while(|x| x * x <= len) {
-            let x = rng.gen::<usize>() % len;
-            let y = rng.gen::<usize>() % len;
-            v.swap(x, y);
-        }
-        v
-    }
-
-    fn gen_big_random(len: usize) -> Vec<[u64; 16]> {
-        let mut rng = thread_rng();
-        rng.gen_iter().map(|x| [x; 16]).take(len).collect()
-    }
-
-    fn gen_big_ascending(len: usize) -> Vec<[u64; 16]> {
-        (0..len as u64).map(|x| [x; 16]).take(len).collect()
-    }
-
-    fn gen_big_descending(len: usize) -> Vec<[u64; 16]> {
-        (0..len as u64).rev().map(|x| [x; 16]).take(len).collect()
-    }
-
-    macro_rules! sort_bench {
-        ($name:ident, $gen:expr, $len:expr) => {
-            #[bench]
-            fn $name(b: &mut Bencher) {
-                b.iter(|| $gen($len).sort());
-                b.bytes = $len * mem::size_of_val(&$gen(1)[0]) as u64;
-            }
-        }
-    }
-
-    sort_bench!(sort_small_random, gen_random, 10);
-    sort_bench!(sort_small_ascending, gen_ascending, 10);
-    sort_bench!(sort_small_descending, gen_descending, 10);
-
-    sort_bench!(sort_small_big_random, gen_big_random, 10);
-    sort_bench!(sort_small_big_ascending, gen_big_ascending, 10);
-    sort_bench!(sort_small_big_descending, gen_big_descending, 10);
-
-    sort_bench!(sort_medium_random, gen_random, 100);
-    sort_bench!(sort_medium_ascending, gen_ascending, 100);
-    sort_bench!(sort_medium_descending, gen_descending, 100);
-
-    sort_bench!(sort_large_random, gen_random, 10000);
-    sort_bench!(sort_large_ascending, gen_ascending, 10000);
-    sort_bench!(sort_large_descending, gen_descending, 10000);
-    sort_bench!(sort_large_mostly_ascending, gen_mostly_ascending, 10000);
-    sort_bench!(sort_large_mostly_descending, gen_mostly_descending, 10000);
-
-    sort_bench!(sort_large_big_random, gen_big_random, 10000);
-    sort_bench!(sort_large_big_ascending, gen_big_ascending, 10000);
-    sort_bench!(sort_large_big_descending, gen_big_descending, 10000);
-
-    #[bench]
-    fn sort_large_random_expensive(b: &mut Bencher) {
-        let len = 10000;
-        b.iter(|| {
-            let mut v = gen_random(len);
-            let mut count = 0;
-            v.sort_by(|a: &u64, b: &u64| {
-                count += 1;
-                if count % 1_000_000_000 == 0 {
-                    panic!("should not happen");
-                }
-                (*a as f64).cos().partial_cmp(&(*b as f64).cos()).unwrap()
-            });
-            black_box(count);
-        });
-        b.bytes = len as u64 * mem::size_of::<u64>() as u64;
-    }
-}
diff --git a/src/libcollectionstest/str.rs b/src/libcollectionstest/str.rs
index 5e685847e3c..6221888f5e5 100644
--- a/src/libcollectionstest/str.rs
+++ b/src/libcollectionstest/str.rs
@@ -1564,294 +1564,3 @@ fn different_str_pattern_forwarding_lifetimes() {
 
     foo::<&str>("x");
 }
-
-mod bench {
-    use test::{Bencher, black_box};
-
-    #[bench]
-    fn char_iterator(b: &mut Bencher) {
-        let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
-
-        b.iter(|| s.chars().count());
-    }
-
-    #[bench]
-    fn char_iterator_for(b: &mut Bencher) {
-        let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
-
-        b.iter(|| {
-            for ch in s.chars() { black_box(ch); }
-        });
-    }
-
-    #[bench]
-    fn char_iterator_ascii(b: &mut Bencher) {
-        let s = "Mary had a little lamb, Little lamb
-        Mary had a little lamb, Little lamb
-        Mary had a little lamb, Little lamb
-        Mary had a little lamb, Little lamb
-        Mary had a little lamb, Little lamb
-        Mary had a little lamb, Little lamb";
-
-        b.iter(|| s.chars().count());
-    }
-
-    #[bench]
-    fn char_iterator_rev(b: &mut Bencher) {
-        let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
-
-        b.iter(|| s.chars().rev().count());
-    }
-
-    #[bench]
-    fn char_iterator_rev_for(b: &mut Bencher) {
-        let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
-
-        b.iter(|| {
-            for ch in s.chars().rev() { black_box(ch); }
-        });
-    }
-
-    #[bench]
-    fn char_indicesator(b: &mut Bencher) {
-        let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
-        let len = s.chars().count();
-
-        b.iter(|| assert_eq!(s.char_indices().count(), len));
-    }
-
-    #[bench]
-    fn char_indicesator_rev(b: &mut Bencher) {
-        let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
-        let len = s.chars().count();
-
-        b.iter(|| assert_eq!(s.char_indices().rev().count(), len));
-    }
-
-    #[bench]
-    fn split_unicode_ascii(b: &mut Bencher) {
-        let s = "ประเทศไทย中华Việt Namประเทศไทย中华Việt Nam";
-
-        b.iter(|| assert_eq!(s.split('V').count(), 3));
-    }
-
-    #[bench]
-    fn split_ascii(b: &mut Bencher) {
-        let s = "Mary had a little lamb, Little lamb, little-lamb.";
-        let len = s.split(' ').count();
-
-        b.iter(|| assert_eq!(s.split(' ').count(), len));
-    }
-
-    #[bench]
-    fn split_extern_fn(b: &mut Bencher) {
-        let s = "Mary had a little lamb, Little lamb, little-lamb.";
-        let len = s.split(' ').count();
-        fn pred(c: char) -> bool { c == ' ' }
-
-        b.iter(|| assert_eq!(s.split(pred).count(), len));
-    }
-
-    #[bench]
-    fn split_closure(b: &mut Bencher) {
-        let s = "Mary had a little lamb, Little lamb, little-lamb.";
-        let len = s.split(' ').count();
-
-        b.iter(|| assert_eq!(s.split(|c: char| c == ' ').count(), len));
-    }
-
-    #[bench]
-    fn split_slice(b: &mut Bencher) {
-        let s = "Mary had a little lamb, Little lamb, little-lamb.";
-        let len = s.split(' ').count();
-
-        let c: &[char] = &[' '];
-        b.iter(|| assert_eq!(s.split(c).count(), len));
-    }
-
-    #[bench]
-    fn bench_join(b: &mut Bencher) {
-        let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
-        let sep = "→";
-        let v = vec![s, s, s, s, s, s, s, s, s, s];
-        b.iter(|| {
-            assert_eq!(v.join(sep).len(), s.len() * 10 + sep.len() * 9);
-        })
-    }
-
-    #[bench]
-    fn bench_contains_short_short(b: &mut Bencher) {
-        let haystack = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
-        let needle = "sit";
-
-        b.iter(|| {
-            assert!(haystack.contains(needle));
-        })
-    }
-
-    #[bench]
-    fn bench_contains_short_long(b: &mut Bencher) {
-        let haystack = "\
-Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse quis lorem sit amet dolor \
-ultricies condimentum. Praesent iaculis purus elit, ac malesuada quam malesuada in. Duis sed orci \
-eros. Suspendisse sit amet magna mollis, mollis nunc luctus, imperdiet mi. Integer fringilla non \
-sem ut lacinia. Fusce varius tortor a risus porttitor hendrerit. Morbi mauris dui, ultricies nec \
-tempus vel, gravida nec quam.
-
-In est dui, tincidunt sed tempus interdum, adipiscing laoreet ante. Etiam tempor, tellus quis \
-sagittis interdum, nulla purus mattis sem, quis auctor erat odio ac tellus. In nec nunc sit amet \
-diam volutpat molestie at sed ipsum. Vestibulum laoreet consequat vulputate. Integer accumsan \
-lorem ac dignissim placerat. Suspendisse convallis faucibus lorem. Aliquam erat volutpat. In vel \
-eleifend felis. Sed suscipit nulla lorem, sed mollis est sollicitudin et. Nam fermentum egestas \
-interdum. Curabitur ut nisi justo.
-
-Sed sollicitudin ipsum tellus, ut condimentum leo eleifend nec. Cras ut velit ante. Phasellus nec \
-mollis odio. Mauris molestie erat in arcu mattis, at aliquet dolor vehicula. Quisque malesuada \
-lectus sit amet nisi pretium, a condimentum ipsum porta. Morbi at dapibus diam. Praesent egestas \
-est sed risus elementum, eu rutrum metus ultrices. Etiam fermentum consectetur magna, id rutrum \
-felis accumsan a. Aliquam ut pellentesque libero. Sed mi nulla, lobortis eu tortor id, suscipit \
-ultricies neque. Morbi iaculis sit amet risus at iaculis. Praesent eget ligula quis turpis \
-feugiat suscipit vel non arcu. Interdum et malesuada fames ac ante ipsum primis in faucibus. \
-Aliquam sit amet placerat lorem.
-
-Cras a lacus vel ante posuere elementum. Nunc est leo, bibendum ut facilisis vel, bibendum at \
-mauris. Nullam adipiscing diam vel odio ornare, luctus adipiscing mi luctus. Nulla facilisi. \
-Mauris adipiscing bibendum neque, quis adipiscing lectus tempus et. Sed feugiat erat et nisl \
-lobortis pharetra. Donec vitae erat enim. Nullam sit amet felis et quam lacinia tincidunt. Aliquam \
-suscipit dapibus urna. Sed volutpat urna in magna pulvinar volutpat. Phasellus nec tellus ac diam \
-cursus accumsan.
-
-Nam lectus enim, dapibus non nisi tempor, consectetur convallis massa. Maecenas eleifend dictum \
-feugiat. Etiam quis mauris vel risus luctus mattis a a nunc. Nullam orci quam, imperdiet id \
-vehicula in, porttitor ut nibh. Duis sagittis adipiscing nisl vitae congue. Donec mollis risus eu \
-leo suscipit, varius porttitor nulla porta. Pellentesque ut sem nec nisi euismod vehicula. Nulla \
-malesuada sollicitudin quam eu fermentum.";
-        let needle = "english";
-
-        b.iter(|| {
-            assert!(!haystack.contains(needle));
-        })
-    }
-
-    #[bench]
-    fn bench_contains_bad_naive(b: &mut Bencher) {
-        let haystack = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";
-        let needle = "aaaaaaaab";
-
-        b.iter(|| {
-            assert!(!haystack.contains(needle));
-        })
-    }
-
-    #[bench]
-    fn bench_contains_equal(b: &mut Bencher) {
-        let haystack = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
-        let needle = "Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
-
-        b.iter(|| {
-            assert!(haystack.contains(needle));
-        })
-    }
-
-    macro_rules! make_test_inner {
-        ($s:ident, $code:expr, $name:ident, $str:expr) => {
-            #[bench]
-            fn $name(bencher: &mut Bencher) {
-                let mut $s = $str;
-                black_box(&mut $s);
-                bencher.iter(|| $code);
-            }
-        }
-    }
-
-    macro_rules! make_test {
-        ($name:ident, $s:ident, $code:expr) => {
-            mod $name {
-                use test::Bencher;
-                use test::black_box;
-
-                // Short strings: 65 bytes each
-                make_test_inner!($s, $code, short_ascii,
-                    "Mary had a little lamb, Little lamb Mary had a littl lamb, lamb!");
-                make_test_inner!($s, $code, short_mixed,
-                    "ศไทย中华Việt Nam; Mary had a little lamb, Little lam!");
-                make_test_inner!($s, $code, short_pile_of_poo,
-                    "💩💩💩💩💩💩💩💩💩💩💩💩💩💩💩💩!");
-                make_test_inner!($s, $code, long_lorem_ipsum,"\
-Lorem ipsum dolor sit amet, consectetur adipiscing elit. Suspendisse quis lorem sit amet dolor \
-ultricies condimentum. Praesent iaculis purus elit, ac malesuada quam malesuada in. Duis sed orci \
-eros. Suspendisse sit amet magna mollis, mollis nunc luctus, imperdiet mi. Integer fringilla non \
-sem ut lacinia. Fusce varius tortor a risus porttitor hendrerit. Morbi mauris dui, ultricies nec \
-tempus vel, gravida nec quam.
-
-In est dui, tincidunt sed tempus interdum, adipiscing laoreet ante. Etiam tempor, tellus quis \
-sagittis interdum, nulla purus mattis sem, quis auctor erat odio ac tellus. In nec nunc sit amet \
-diam volutpat molestie at sed ipsum. Vestibulum laoreet consequat vulputate. Integer accumsan \
-lorem ac dignissim placerat. Suspendisse convallis faucibus lorem. Aliquam erat volutpat. In vel \
-eleifend felis. Sed suscipit nulla lorem, sed mollis est sollicitudin et. Nam fermentum egestas \
-interdum. Curabitur ut nisi justo.
-
-Sed sollicitudin ipsum tellus, ut condimentum leo eleifend nec. Cras ut velit ante. Phasellus nec \
-mollis odio. Mauris molestie erat in arcu mattis, at aliquet dolor vehicula. Quisque malesuada \
-lectus sit amet nisi pretium, a condimentum ipsum porta. Morbi at dapibus diam. Praesent egestas \
-est sed risus elementum, eu rutrum metus ultrices. Etiam fermentum consectetur magna, id rutrum \
-felis accumsan a. Aliquam ut pellentesque libero. Sed mi nulla, lobortis eu tortor id, suscipit \
-ultricies neque. Morbi iaculis sit amet risus at iaculis. Praesent eget ligula quis turpis \
-feugiat suscipit vel non arcu. Interdum et malesuada fames ac ante ipsum primis in faucibus. \
-Aliquam sit amet placerat lorem.
-
-Cras a lacus vel ante posuere elementum. Nunc est leo, bibendum ut facilisis vel, bibendum at \
-mauris. Nullam adipiscing diam vel odio ornare, luctus adipiscing mi luctus. Nulla facilisi. \
-Mauris adipiscing bibendum neque, quis adipiscing lectus tempus et. Sed feugiat erat et nisl \
-lobortis pharetra. Donec vitae erat enim. Nullam sit amet felis et quam lacinia tincidunt. Aliquam \
-suscipit dapibus urna. Sed volutpat urna in magna pulvinar volutpat. Phasellus nec tellus ac diam \
-cursus accumsan.
-
-Nam lectus enim, dapibus non nisi tempor, consectetur convallis massa. Maecenas eleifend dictum \
-feugiat. Etiam quis mauris vel risus luctus mattis a a nunc. Nullam orci quam, imperdiet id \
-vehicula in, porttitor ut nibh. Duis sagittis adipiscing nisl vitae congue. Donec mollis risus eu \
-leo suscipit, varius porttitor nulla porta. Pellentesque ut sem nec nisi euismod vehicula. Nulla \
-malesuada sollicitudin quam eu fermentum!");
-            }
-        }
-    }
-
-    make_test!(chars_count, s, s.chars().count());
-
-    make_test!(contains_bang_str, s, s.contains("!"));
-    make_test!(contains_bang_char, s, s.contains('!'));
-
-    make_test!(match_indices_a_str, s, s.match_indices("a").count());
-
-    make_test!(split_a_str, s, s.split("a").count());
-
-    make_test!(trim_ascii_char, s, {
-        use std::ascii::AsciiExt;
-        s.trim_matches(|c: char| c.is_ascii())
-    });
-    make_test!(trim_left_ascii_char, s, {
-        use std::ascii::AsciiExt;
-        s.trim_left_matches(|c: char| c.is_ascii())
-    });
-    make_test!(trim_right_ascii_char, s, {
-        use std::ascii::AsciiExt;
-        s.trim_right_matches(|c: char| c.is_ascii())
-    });
-
-    make_test!(find_underscore_char, s, s.find('_'));
-    make_test!(rfind_underscore_char, s, s.rfind('_'));
-    make_test!(find_underscore_str, s, s.find("_"));
-
-    make_test!(find_zzz_char, s, s.find('\u{1F4A4}'));
-    make_test!(rfind_zzz_char, s, s.rfind('\u{1F4A4}'));
-    make_test!(find_zzz_str, s, s.find("\u{1F4A4}"));
-
-    make_test!(split_space_char, s, s.split(' ').count());
-    make_test!(split_terminator_space_char, s, s.split_terminator(' ').count());
-
-    make_test!(splitn_space_char, s, s.splitn(10, ' ').count());
-    make_test!(rsplitn_space_char, s, s.rsplitn(10, ' ').count());
-
-    make_test!(split_space_str, s, s.split(" ").count());
-    make_test!(split_ad_str, s, s.split("ad").count());
-}
diff --git a/src/libcollectionstest/string.rs b/src/libcollectionstest/string.rs
index a7d85d0bea1..f77dd510303 100644
--- a/src/libcollectionstest/string.rs
+++ b/src/libcollectionstest/string.rs
@@ -9,9 +9,6 @@
 // except according to those terms.
 
 use std::borrow::Cow;
-use std::iter::repeat;
-
-use test::Bencher;
 
 pub trait IntoCow<'a, B: ?Sized> where B: ToOwned {
     fn into_cow(self) -> Cow<'a, B>;
@@ -436,125 +433,3 @@ fn test_into_boxed_str() {
     let ys = xs.into_boxed_str();
     assert_eq!(&*ys, "hello my name is bob");
 }
-
-#[bench]
-fn bench_with_capacity(b: &mut Bencher) {
-    b.iter(|| String::with_capacity(100));
-}
-
-#[bench]
-fn bench_push_str(b: &mut Bencher) {
-    let s = "ศไทย中华Việt Nam; Mary had a little lamb, Little lamb";
-    b.iter(|| {
-        let mut r = String::new();
-        r.push_str(s);
-    });
-}
-
-const REPETITIONS: u64 = 10_000;
-
-#[bench]
-fn bench_push_str_one_byte(b: &mut Bencher) {
-    b.bytes = REPETITIONS;
-    b.iter(|| {
-        let mut r = String::new();
-        for _ in 0..REPETITIONS {
-            r.push_str("a")
-        }
-    });
-}
-
-#[bench]
-fn bench_push_char_one_byte(b: &mut Bencher) {
-    b.bytes = REPETITIONS;
-    b.iter(|| {
-        let mut r = String::new();
-        for _ in 0..REPETITIONS {
-            r.push('a')
-        }
-    });
-}
-
-#[bench]
-fn bench_push_char_two_bytes(b: &mut Bencher) {
-    b.bytes = REPETITIONS * 2;
-    b.iter(|| {
-        let mut r = String::new();
-        for _ in 0..REPETITIONS {
-            r.push('â')
-        }
-    });
-}
-
-#[bench]
-fn from_utf8_lossy_100_ascii(b: &mut Bencher) {
-    let s = b"Hello there, the quick brown fox jumped over the lazy dog! \
-              Lorem ipsum dolor sit amet, consectetur. ";
-
-    assert_eq!(100, s.len());
-    b.iter(|| {
-        let _ = String::from_utf8_lossy(s);
-    });
-}
-
-#[bench]
-fn from_utf8_lossy_100_multibyte(b: &mut Bencher) {
-    let s = "𐌀𐌖𐌋𐌄𐌑𐌉ปรدولة الكويتทศไทย中华𐍅𐌿𐌻𐍆𐌹𐌻𐌰".as_bytes();
-    assert_eq!(100, s.len());
-    b.iter(|| {
-        let _ = String::from_utf8_lossy(s);
-    });
-}
-
-#[bench]
-fn from_utf8_lossy_invalid(b: &mut Bencher) {
-    let s = b"Hello\xC0\x80 There\xE6\x83 Goodbye";
-    b.iter(|| {
-        let _ = String::from_utf8_lossy(s);
-    });
-}
-
-#[bench]
-fn from_utf8_lossy_100_invalid(b: &mut Bencher) {
-    let s = repeat(0xf5).take(100).collect::<Vec<_>>();
-    b.iter(|| {
-        let _ = String::from_utf8_lossy(&s);
-    });
-}
-
-#[bench]
-fn bench_exact_size_shrink_to_fit(b: &mut Bencher) {
-    let s = "Hello there, the quick brown fox jumped over the lazy dog! \
-             Lorem ipsum dolor sit amet, consectetur. ";
-    // ensure our operation produces an exact-size string before we benchmark it
-    let mut r = String::with_capacity(s.len());
-    r.push_str(s);
-    assert_eq!(r.len(), r.capacity());
-    b.iter(|| {
-        let mut r = String::with_capacity(s.len());
-        r.push_str(s);
-        r.shrink_to_fit();
-        r
-    });
-}
-
-#[bench]
-fn bench_from_str(b: &mut Bencher) {
-    let s = "Hello there, the quick brown fox jumped over the lazy dog! \
-             Lorem ipsum dolor sit amet, consectetur. ";
-    b.iter(|| String::from(s))
-}
-
-#[bench]
-fn bench_from(b: &mut Bencher) {
-    let s = "Hello there, the quick brown fox jumped over the lazy dog! \
-             Lorem ipsum dolor sit amet, consectetur. ";
-    b.iter(|| String::from(s))
-}
-
-#[bench]
-fn bench_to_string(b: &mut Bencher) {
-    let s = "Hello there, the quick brown fox jumped over the lazy dog! \
-             Lorem ipsum dolor sit amet, consectetur. ";
-    b.iter(|| s.to_string())
-}
diff --git a/src/libcollectionstest/vec.rs b/src/libcollectionstest/vec.rs
index 6d0f1eaffaa..edeedf1d40b 100644
--- a/src/libcollectionstest/vec.rs
+++ b/src/libcollectionstest/vec.rs
@@ -10,13 +10,10 @@
 
 use std::ascii::AsciiExt;
 use std::borrow::Cow;
-use std::iter::{FromIterator, repeat};
 use std::mem::size_of;
 use std::panic;
 use std::vec::{Drain, IntoIter};
 
-use test::Bencher;
-
 struct DropCounter<'a> {
     count: &'a mut u32,
 }
@@ -633,483 +630,3 @@ fn test_placement_panic() {
     let _ = panic::catch_unwind(panic::AssertUnwindSafe(|| { vec.place_back() <- mkpanic(); }));
     assert_eq!(vec.len(), 3);
 }
-
-#[bench]
-fn bench_new(b: &mut Bencher) {
-    b.iter(|| {
-        let v: Vec<u32> = Vec::new();
-        assert_eq!(v.len(), 0);
-        assert_eq!(v.capacity(), 0);
-    })
-}
-
-fn do_bench_with_capacity(b: &mut Bencher, src_len: usize) {
-    b.bytes = src_len as u64;
-
-    b.iter(|| {
-        let v: Vec<u32> = Vec::with_capacity(src_len);
-        assert_eq!(v.len(), 0);
-        assert_eq!(v.capacity(), src_len);
-    })
-}
-
-#[bench]
-fn bench_with_capacity_0000(b: &mut Bencher) {
-    do_bench_with_capacity(b, 0)
-}
-
-#[bench]
-fn bench_with_capacity_0010(b: &mut Bencher) {
-    do_bench_with_capacity(b, 10)
-}
-
-#[bench]
-fn bench_with_capacity_0100(b: &mut Bencher) {
-    do_bench_with_capacity(b, 100)
-}
-
-#[bench]
-fn bench_with_capacity_1000(b: &mut Bencher) {
-    do_bench_with_capacity(b, 1000)
-}
-
-fn do_bench_from_fn(b: &mut Bencher, src_len: usize) {
-    b.bytes = src_len as u64;
-
-    b.iter(|| {
-        let dst = (0..src_len).collect::<Vec<_>>();
-        assert_eq!(dst.len(), src_len);
-        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
-    })
-}
-
-#[bench]
-fn bench_from_fn_0000(b: &mut Bencher) {
-    do_bench_from_fn(b, 0)
-}
-
-#[bench]
-fn bench_from_fn_0010(b: &mut Bencher) {
-    do_bench_from_fn(b, 10)
-}
-
-#[bench]
-fn bench_from_fn_0100(b: &mut Bencher) {
-    do_bench_from_fn(b, 100)
-}
-
-#[bench]
-fn bench_from_fn_1000(b: &mut Bencher) {
-    do_bench_from_fn(b, 1000)
-}
-
-fn do_bench_from_elem(b: &mut Bencher, src_len: usize) {
-    b.bytes = src_len as u64;
-
-    b.iter(|| {
-        let dst: Vec<usize> = repeat(5).take(src_len).collect();
-        assert_eq!(dst.len(), src_len);
-        assert!(dst.iter().all(|x| *x == 5));
-    })
-}
-
-#[bench]
-fn bench_from_elem_0000(b: &mut Bencher) {
-    do_bench_from_elem(b, 0)
-}
-
-#[bench]
-fn bench_from_elem_0010(b: &mut Bencher) {
-    do_bench_from_elem(b, 10)
-}
-
-#[bench]
-fn bench_from_elem_0100(b: &mut Bencher) {
-    do_bench_from_elem(b, 100)
-}
-
-#[bench]
-fn bench_from_elem_1000(b: &mut Bencher) {
-    do_bench_from_elem(b, 1000)
-}
-
-fn do_bench_from_slice(b: &mut Bencher, src_len: usize) {
-    let src: Vec<_> = FromIterator::from_iter(0..src_len);
-
-    b.bytes = src_len as u64;
-
-    b.iter(|| {
-        let dst = src.clone()[..].to_vec();
-        assert_eq!(dst.len(), src_len);
-        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
-    });
-}
-
-#[bench]
-fn bench_from_slice_0000(b: &mut Bencher) {
-    do_bench_from_slice(b, 0)
-}
-
-#[bench]
-fn bench_from_slice_0010(b: &mut Bencher) {
-    do_bench_from_slice(b, 10)
-}
-
-#[bench]
-fn bench_from_slice_0100(b: &mut Bencher) {
-    do_bench_from_slice(b, 100)
-}
-
-#[bench]
-fn bench_from_slice_1000(b: &mut Bencher) {
-    do_bench_from_slice(b, 1000)
-}
-
-fn do_bench_from_iter(b: &mut Bencher, src_len: usize) {
-    let src: Vec<_> = FromIterator::from_iter(0..src_len);
-
-    b.bytes = src_len as u64;
-
-    b.iter(|| {
-        let dst: Vec<_> = FromIterator::from_iter(src.clone());
-        assert_eq!(dst.len(), src_len);
-        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
-    });
-}
-
-#[bench]
-fn bench_from_iter_0000(b: &mut Bencher) {
-    do_bench_from_iter(b, 0)
-}
-
-#[bench]
-fn bench_from_iter_0010(b: &mut Bencher) {
-    do_bench_from_iter(b, 10)
-}
-
-#[bench]
-fn bench_from_iter_0100(b: &mut Bencher) {
-    do_bench_from_iter(b, 100)
-}
-
-#[bench]
-fn bench_from_iter_1000(b: &mut Bencher) {
-    do_bench_from_iter(b, 1000)
-}
-
-fn do_bench_extend(b: &mut Bencher, dst_len: usize, src_len: usize) {
-    let dst: Vec<_> = FromIterator::from_iter(0..dst_len);
-    let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
-
-    b.bytes = src_len as u64;
-
-    b.iter(|| {
-        let mut dst = dst.clone();
-        dst.extend(src.clone());
-        assert_eq!(dst.len(), dst_len + src_len);
-        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
-    });
-}
-
-#[bench]
-fn bench_extend_0000_0000(b: &mut Bencher) {
-    do_bench_extend(b, 0, 0)
-}
-
-#[bench]
-fn bench_extend_0000_0010(b: &mut Bencher) {
-    do_bench_extend(b, 0, 10)
-}
-
-#[bench]
-fn bench_extend_0000_0100(b: &mut Bencher) {
-    do_bench_extend(b, 0, 100)
-}
-
-#[bench]
-fn bench_extend_0000_1000(b: &mut Bencher) {
-    do_bench_extend(b, 0, 1000)
-}
-
-#[bench]
-fn bench_extend_0010_0010(b: &mut Bencher) {
-    do_bench_extend(b, 10, 10)
-}
-
-#[bench]
-fn bench_extend_0100_0100(b: &mut Bencher) {
-    do_bench_extend(b, 100, 100)
-}
-
-#[bench]
-fn bench_extend_1000_1000(b: &mut Bencher) {
-    do_bench_extend(b, 1000, 1000)
-}
-
-fn do_bench_push_all(b: &mut Bencher, dst_len: usize, src_len: usize) {
-    let dst: Vec<_> = FromIterator::from_iter(0..dst_len);
-    let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
-
-    b.bytes = src_len as u64;
-
-    b.iter(|| {
-        let mut dst = dst.clone();
-        dst.extend_from_slice(&src);
-        assert_eq!(dst.len(), dst_len + src_len);
-        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
-    });
-}
-
-#[bench]
-fn bench_push_all_0000_0000(b: &mut Bencher) {
-    do_bench_push_all(b, 0, 0)
-}
-
-#[bench]
-fn bench_push_all_0000_0010(b: &mut Bencher) {
-    do_bench_push_all(b, 0, 10)
-}
-
-#[bench]
-fn bench_push_all_0000_0100(b: &mut Bencher) {
-    do_bench_push_all(b, 0, 100)
-}
-
-#[bench]
-fn bench_push_all_0000_1000(b: &mut Bencher) {
-    do_bench_push_all(b, 0, 1000)
-}
-
-#[bench]
-fn bench_push_all_0010_0010(b: &mut Bencher) {
-    do_bench_push_all(b, 10, 10)
-}
-
-#[bench]
-fn bench_push_all_0100_0100(b: &mut Bencher) {
-    do_bench_push_all(b, 100, 100)
-}
-
-#[bench]
-fn bench_push_all_1000_1000(b: &mut Bencher) {
-    do_bench_push_all(b, 1000, 1000)
-}
-
-fn do_bench_push_all_move(b: &mut Bencher, dst_len: usize, src_len: usize) {
-    let dst: Vec<_> = FromIterator::from_iter(0..dst_len);
-    let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
-
-    b.bytes = src_len as u64;
-
-    b.iter(|| {
-        let mut dst = dst.clone();
-        dst.extend(src.clone());
-        assert_eq!(dst.len(), dst_len + src_len);
-        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
-    });
-}
-
-#[bench]
-fn bench_push_all_move_0000_0000(b: &mut Bencher) {
-    do_bench_push_all_move(b, 0, 0)
-}
-
-#[bench]
-fn bench_push_all_move_0000_0010(b: &mut Bencher) {
-    do_bench_push_all_move(b, 0, 10)
-}
-
-#[bench]
-fn bench_push_all_move_0000_0100(b: &mut Bencher) {
-    do_bench_push_all_move(b, 0, 100)
-}
-
-#[bench]
-fn bench_push_all_move_0000_1000(b: &mut Bencher) {
-    do_bench_push_all_move(b, 0, 1000)
-}
-
-#[bench]
-fn bench_push_all_move_0010_0010(b: &mut Bencher) {
-    do_bench_push_all_move(b, 10, 10)
-}
-
-#[bench]
-fn bench_push_all_move_0100_0100(b: &mut Bencher) {
-    do_bench_push_all_move(b, 100, 100)
-}
-
-#[bench]
-fn bench_push_all_move_1000_1000(b: &mut Bencher) {
-    do_bench_push_all_move(b, 1000, 1000)
-}
-
-fn do_bench_clone(b: &mut Bencher, src_len: usize) {
-    let src: Vec<usize> = FromIterator::from_iter(0..src_len);
-
-    b.bytes = src_len as u64;
-
-    b.iter(|| {
-        let dst = src.clone();
-        assert_eq!(dst.len(), src_len);
-        assert!(dst.iter().enumerate().all(|(i, x)| i == *x));
-    });
-}
-
-#[bench]
-fn bench_clone_0000(b: &mut Bencher) {
-    do_bench_clone(b, 0)
-}
-
-#[bench]
-fn bench_clone_0010(b: &mut Bencher) {
-    do_bench_clone(b, 10)
-}
-
-#[bench]
-fn bench_clone_0100(b: &mut Bencher) {
-    do_bench_clone(b, 100)
-}
-
-#[bench]
-fn bench_clone_1000(b: &mut Bencher) {
-    do_bench_clone(b, 1000)
-}
-
-fn do_bench_clone_from(b: &mut Bencher, times: usize, dst_len: usize, src_len: usize) {
-    let dst: Vec<_> = FromIterator::from_iter(0..src_len);
-    let src: Vec<_> = FromIterator::from_iter(dst_len..dst_len + src_len);
-
-    b.bytes = (times * src_len) as u64;
-
-    b.iter(|| {
-        let mut dst = dst.clone();
-
-        for _ in 0..times {
-            dst.clone_from(&src);
-
-            assert_eq!(dst.len(), src_len);
-            assert!(dst.iter().enumerate().all(|(i, x)| dst_len + i == *x));
-        }
-    });
-}
-
-#[bench]
-fn bench_clone_from_01_0000_0000(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 0, 0)
-}
-
-#[bench]
-fn bench_clone_from_01_0000_0010(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 0, 10)
-}
-
-#[bench]
-fn bench_clone_from_01_0000_0100(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 0, 100)
-}
-
-#[bench]
-fn bench_clone_from_01_0000_1000(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 0, 1000)
-}
-
-#[bench]
-fn bench_clone_from_01_0010_0010(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 10, 10)
-}
-
-#[bench]
-fn bench_clone_from_01_0100_0100(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 100, 100)
-}
-
-#[bench]
-fn bench_clone_from_01_1000_1000(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 1000, 1000)
-}
-
-#[bench]
-fn bench_clone_from_01_0010_0100(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 10, 100)
-}
-
-#[bench]
-fn bench_clone_from_01_0100_1000(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 100, 1000)
-}
-
-#[bench]
-fn bench_clone_from_01_0010_0000(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 10, 0)
-}
-
-#[bench]
-fn bench_clone_from_01_0100_0010(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 100, 10)
-}
-
-#[bench]
-fn bench_clone_from_01_1000_0100(b: &mut Bencher) {
-    do_bench_clone_from(b, 1, 1000, 100)
-}
-
-#[bench]
-fn bench_clone_from_10_0000_0000(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 0, 0)
-}
-
-#[bench]
-fn bench_clone_from_10_0000_0010(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 0, 10)
-}
-
-#[bench]
-fn bench_clone_from_10_0000_0100(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 0, 100)
-}
-
-#[bench]
-fn bench_clone_from_10_0000_1000(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 0, 1000)
-}
-
-#[bench]
-fn bench_clone_from_10_0010_0010(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 10, 10)
-}
-
-#[bench]
-fn bench_clone_from_10_0100_0100(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 100, 100)
-}
-
-#[bench]
-fn bench_clone_from_10_1000_1000(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 1000, 1000)
-}
-
-#[bench]
-fn bench_clone_from_10_0010_0100(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 10, 100)
-}
-
-#[bench]
-fn bench_clone_from_10_0100_1000(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 100, 1000)
-}
-
-#[bench]
-fn bench_clone_from_10_0010_0000(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 10, 0)
-}
-
-#[bench]
-fn bench_clone_from_10_0100_0010(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 100, 10)
-}
-
-#[bench]
-fn bench_clone_from_10_1000_0100(b: &mut Bencher) {
-    do_bench_clone_from(b, 10, 1000, 100)
-}
diff --git a/src/libcollectionstest/vec_deque.rs b/src/libcollectionstest/vec_deque.rs
index bb60f888f8b..1541061a198 100644
--- a/src/libcollectionstest/vec_deque.rs
+++ b/src/libcollectionstest/vec_deque.rs
@@ -12,8 +12,6 @@ use std::collections::VecDeque;
 use std::fmt::Debug;
 use std::collections::vec_deque::Drain;
 
-use test;
-
 use self::Taggy::*;
 use self::Taggypar::*;
 
@@ -124,51 +122,6 @@ fn test_index_out_of_bounds() {
     deq[3];
 }
 
-#[bench]
-fn bench_new(b: &mut test::Bencher) {
-    b.iter(|| {
-        let ring: VecDeque<i32> = VecDeque::new();
-        test::black_box(ring);
-    })
-}
-
-#[bench]
-fn bench_grow_1025(b: &mut test::Bencher) {
-    b.iter(|| {
-        let mut deq = VecDeque::new();
-        for i in 0..1025 {
-            deq.push_front(i);
-        }
-        test::black_box(deq);
-    })
-}
-
-#[bench]
-fn bench_iter_1000(b: &mut test::Bencher) {
-    let ring: VecDeque<_> = (0..1000).collect();
-
-    b.iter(|| {
-        let mut sum = 0;
-        for &i in &ring {
-            sum += i;
-        }
-        test::black_box(sum);
-    })
-}
-
-#[bench]
-fn bench_mut_iter_1000(b: &mut test::Bencher) {
-    let mut ring: VecDeque<_> = (0..1000).collect();
-
-    b.iter(|| {
-        let mut sum = 0;
-        for i in &mut ring {
-            sum += *i;
-        }
-        test::black_box(sum);
-    })
-}
-
 #[derive(Clone, PartialEq, Debug)]
 enum Taggy {
     One(i32),
diff --git a/src/libcore/Cargo.toml b/src/libcore/Cargo.toml
index 4f7cd7b016d..e847c7fa3a0 100644
--- a/src/libcore/Cargo.toml
+++ b/src/libcore/Cargo.toml
@@ -14,5 +14,5 @@ name = "coretest"
 path = "../libcoretest/lib.rs"
 
 [[bench]]
-name = "corebench"
-path = "../libcore/bench/lib.rs"
+name = "corebenches"
+path = "../libcore/benches/lib.rs"
diff --git a/src/libcore/bench/any.rs b/src/libcore/benches/any.rs
index 67e02cf9509..67e02cf9509 100644
--- a/src/libcore/bench/any.rs
+++ b/src/libcore/benches/any.rs
diff --git a/src/libcore/bench/hash/mod.rs b/src/libcore/benches/hash/mod.rs
index 55d9e3e0913..55d9e3e0913 100644
--- a/src/libcore/bench/hash/mod.rs
+++ b/src/libcore/benches/hash/mod.rs
diff --git a/src/libcore/bench/hash/sip.rs b/src/libcore/benches/hash/sip.rs
index 3379c85bbec..3379c85bbec 100644
--- a/src/libcore/bench/hash/sip.rs
+++ b/src/libcore/benches/hash/sip.rs
diff --git a/src/libcore/bench/iter.rs b/src/libcore/benches/iter.rs
index 93d38a5bc83..93d38a5bc83 100644
--- a/src/libcore/bench/iter.rs
+++ b/src/libcore/benches/iter.rs
diff --git a/src/libcore/bench/lib.rs b/src/libcore/benches/lib.rs
index d2db329da79..d2db329da79 100644
--- a/src/libcore/bench/lib.rs
+++ b/src/libcore/benches/lib.rs
diff --git a/src/libcore/bench/mem.rs b/src/libcore/benches/mem.rs
index 8e541d92a7f..8e541d92a7f 100644
--- a/src/libcore/bench/mem.rs
+++ b/src/libcore/benches/mem.rs
diff --git a/src/libcore/bench/num/dec2flt/mod.rs b/src/libcore/benches/num/dec2flt/mod.rs
index 562866e1177..562866e1177 100644
--- a/src/libcore/bench/num/dec2flt/mod.rs
+++ b/src/libcore/benches/num/dec2flt/mod.rs
diff --git a/src/libcore/bench/num/flt2dec/mod.rs b/src/libcore/benches/num/flt2dec/mod.rs
index 1de2bf4921f..1de2bf4921f 100644
--- a/src/libcore/bench/num/flt2dec/mod.rs
+++ b/src/libcore/benches/num/flt2dec/mod.rs
diff --git a/src/libcore/bench/num/flt2dec/strategy/dragon.rs b/src/libcore/benches/num/flt2dec/strategy/dragon.rs
index 6824cf40ed2..6824cf40ed2 100644
--- a/src/libcore/bench/num/flt2dec/strategy/dragon.rs
+++ b/src/libcore/benches/num/flt2dec/strategy/dragon.rs
diff --git a/src/libcore/bench/num/flt2dec/strategy/grisu.rs b/src/libcore/benches/num/flt2dec/strategy/grisu.rs
index 82e1a858fca..82e1a858fca 100644
--- a/src/libcore/bench/num/flt2dec/strategy/grisu.rs
+++ b/src/libcore/benches/num/flt2dec/strategy/grisu.rs
diff --git a/src/libcore/bench/num/mod.rs b/src/libcore/benches/num/mod.rs
index 55f0bdb57ec..55f0bdb57ec 100644
--- a/src/libcore/bench/num/mod.rs
+++ b/src/libcore/benches/num/mod.rs
diff --git a/src/libcore/bench/ops.rs b/src/libcore/benches/ops.rs
index 7f36a4b0771..7f36a4b0771 100644
--- a/src/libcore/bench/ops.rs
+++ b/src/libcore/benches/ops.rs