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use std::fmt::{self, Write as FmtWrite};
use std::io::{self, Write as IoWrite};
use test::Bencher;
#[bench]
fn write_vec_value(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = Vec::new();
for _ in 0..1000 {
mem.write_all("abc".as_bytes()).unwrap();
}
});
}
#[bench]
fn write_vec_ref(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = Vec::new();
let wr = &mut mem as &mut dyn io::Write;
for _ in 0..1000 {
wr.write_all("abc".as_bytes()).unwrap();
}
});
}
#[bench]
fn write_vec_macro1(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = Vec::new();
let wr = &mut mem as &mut dyn io::Write;
for _ in 0..1000 {
write!(wr, "abc").unwrap();
}
});
}
#[bench]
fn write_vec_macro2(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = Vec::new();
let wr = &mut mem as &mut dyn io::Write;
for _ in 0..1000 {
write!(wr, "{}", "abc").unwrap();
}
});
}
#[bench]
fn write_vec_macro_debug(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = Vec::new();
let wr = &mut mem as &mut dyn io::Write;
for _ in 0..1000 {
write!(wr, "{:?}", "☃").unwrap();
}
});
}
#[bench]
fn write_str_value(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = String::new();
for _ in 0..1000 {
mem.write_str("abc").unwrap();
}
});
}
#[bench]
fn write_str_ref(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = String::new();
let wr = &mut mem as &mut dyn fmt::Write;
for _ in 0..1000 {
wr.write_str("abc").unwrap();
}
});
}
#[bench]
fn write_str_macro1(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = String::new();
for _ in 0..1000 {
write!(mem, "abc").unwrap();
}
});
}
#[bench]
fn write_str_macro2(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = String::new();
let wr = &mut mem as &mut dyn fmt::Write;
for _ in 0..1000 {
write!(wr, "{}", "abc").unwrap();
}
});
}
#[bench]
fn write_str_macro_debug(bh: &mut Bencher) {
bh.iter(|| {
let mut mem = String::new();
let wr = &mut mem as &mut dyn fmt::Write;
for _ in 0..1000 {
write!(wr, "{:?}", "☃").unwrap();
}
});
}
|
