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| author | bors <bors@rust-lang.org> | 2018-11-03 09:33:10 +0000 |
|---|---|---|
| committer | bors <bors@rust-lang.org> | 2018-11-03 09:33:10 +0000 |
| commit | b6e8f9dbdc4f154d799589ce5e21c020c51f2123 (patch) | |
| tree | 7a94b270eb09437ba0b116c5b901d3dd9cdc5534 /src/libstd/alloc.rs | |
| parent | 757d6cc91a691c8a749a7b0eee09df494ecdcc3b (diff) | |
| parent | 14c6835e03b285f7c73459ca851848fe8513b7a5 (diff) | |
| download | rust-b6e8f9dbdc4f154d799589ce5e21c020c51f2123.tar.gz rust-b6e8f9dbdc4f154d799589ce5e21c020c51f2123.zip | |
Auto merge of #55238 - alexcrichton:rm-jemalloc, r=estebank
Remove the `alloc_jemalloc` crate This commit removes the `alloc_jemalloc` crate from the standard library and all related configuration. We will no longer be shipping this unstable crate. Rationale for this is provided on https://github.com/rust-lang/rust/issues/36963 and the many linked issues, but I can inline rationale here if desired! We currently rely on jemalloc for increased perf in the Rust compiler, however. [This perf run shows](https://perf.rust-lang.org/compare.html?start=74ff7dcb1388e60a613cd6050bcd372a3cc4998b&end=7e7928dc0340d79b404e93f0c79eb4b946c1d669&stat=wall-time) that if we switch to glibc 2.23's allocator that it's slower than jemalloc across many benchmarks. [This perf run, however](https://perf.rust-lang.org/compare.html?start=22cc2ae8057d14e980b7c784e1eb2eee26b59e7d&end=10c95ccfa7a7adc12f4e608621ca29f9b98eed29), shows that if we use `jemalloc-sys` from crates.io then rustc actually gets faster across all benchmarks! (presumably because it has a more recent version of jemalloc than our submodule). As a result, it's expected that this doesn't regress any code (as it's just removing an unstable crate) and it should actually improve rustc performance because it updates jemalloc. Closes #36963
Diffstat (limited to 'src/libstd/alloc.rs')
| -rw-r--r-- | src/libstd/alloc.rs | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/src/libstd/alloc.rs b/src/libstd/alloc.rs index 31fc9ed3f77..1ff342fa7a7 100644 --- a/src/libstd/alloc.rs +++ b/src/libstd/alloc.rs @@ -13,13 +13,10 @@ //! In a given program, the standard library has one “global” memory allocator //! that is used for example by `Box<T>` and `Vec<T>`. //! -//! Currently the default global allocator is unspecified. -//! The compiler may link to a version of [jemalloc] on some platforms, -//! but this is not guaranteed. -//! Libraries, however, like `cdylib`s and `staticlib`s are guaranteed -//! to use the [`System`] by default. +//! Currently the default global allocator is unspecified. Libraries, however, +//! like `cdylib`s and `staticlib`s are guaranteed to use the [`System`] by +//! default. //! -//! [jemalloc]: https://github.com/jemalloc/jemalloc //! [`System`]: struct.System.html //! //! # The `#[global_allocator]` attribute |