README.md

jemallocator

Links against jemalloc and provides a Jemalloc unit type that implements the allocator APIs and can be set as the #[global_allocator]

Overview

The jemalloc support ecosystem consists of the following crates:

• jemalloc-sys: builds and links against jemalloc exposing raw C bindings to it.
• jemallocator: provides the Jemalloc type which implements the GlobalAlloc and Alloc traits.
• jemalloc-ctl: high-level wrapper over jemalloc's control and introspection APIs (the mallctl*() family of functions and the MALLCTL NAMESPACE)'

Documentation

• Latest release (docs.rs)
• Master branch

To use jemallocator add it as a dependency:

# Cargo.toml
[dependencies]

[target.'cfg(not(target_env = "msvc"))'.dependencies]
jemallocator = "0.3.2"

To set jemallocator::Jemalloc as the global allocator add this to your project:

# main.rs
#[cfg(not(target_env = "msvc"))]
use jemallocator::Jemalloc;

#[cfg(not(target_env = "msvc"))]
#[global_allocator]
static GLOBAL: Jemalloc = Jemalloc;

And that's it! Once you've defined this static then jemalloc will be used for all allocations requested by Rust code in the same program.

Platform support

The following table describes the supported platforms:

• build: does the library compile for the target?
• run: do jemallocator and jemalloc-sys tests pass on the target?
• jemalloc: do jemalloc's tests pass on the target?
• valgrind: do the tests pass under valgrind?

Tier 1 targets are tested on all Rust channels (stable, beta, and nightly). All other targets are only tested on Rust nightly.

Linux targets:	build	run	jemalloc	valgrind
aarch64-unknown-linux-gnu	✓	✓	✗	✗
arm-unknown-linux-gnueabi	✓	✓	✗	✗
armv7-unknown-linux-gnueabi	✓	✓	✗	✗
i586-unknown-linux-gnu	✓	✓	✓	✗
i686-unknown-linux-gnu (tier 1)	✓	✓	✓	✗
mips-unknown-linux-gnu	✓	✓	✗	✗
mipsel-unknown-linux-musl	✓	✓	✗	✗
mips64-unknown-linux-gnuabi64	✓	✓	✗	✗
mips64el-unknown-linux-gnuabi64	✓	✓	✗	✗
powerpc-unknown-linux-gnu	✓	✓	✗	✗
powerpc64-unknown-linux-gnu	✓	✓	✗	✗
powerpc64le-unknown-linux-gnu	✓	✓	✗	✗
x86_64-unknown-linux-gnu (tier 1)	✓	✓	✓	✓
MacOSX targets:	build	run	jemalloc	valgrind
x86_64-apple-darwin (tier 1)	✓	✓	✗	✗
i686-apple-darwin (tier 1)	✓	✓	✗	✗
Windows targets:	build	run	jemalloc	valgrind
x86_64-pc-windows-msvc (tier 1)	✗	✗	✗	✗
i686-pc-windows-msvc (tier 1)	✗	✗	✗	✗
x86_64-pc-windows-gnu (tier 1)	✓	✓	✗	✗
i686-pc-windows-gnu (tier 1)	✓	✓	✗	✗
Android targets:	build	run	jemalloc	valgrind
aarch64-linux-android	✓	✓	✗	✗
x86_64-linux-android	✓	✓	✓	✗

Features

The jemallocator crate re-exports the features of the jemalloc-sys dependency.

License

This project is licensed under either of

• Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in jemallocator by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.