From: bors Date: Mon, 5 Apr 2021 21:14:27 +0000 (+0000) Subject: Auto merge of #83152 - guswynn:jemallocator_part2, r=Mark-Simulacrum X-Git-Url: https://git.lizzy.rs/?a=commitdiff_plain;h=d32238532138485c80db4f2cd596372bce214e00;p=rust.git Auto merge of #83152 - guswynn:jemallocator_part2, r=Mark-Simulacrum Use tikv-jemallocator in rustc/rustdoc in addition to jemalloc-sys when enabled. In https://github.com/rust-lang/rust/pull/81782 it was mentioned that one reason rustc may benefit from minimalloc is it doesn't use the `sdallocx` api from jemalloc. Currently, on unix, rust uses jemalloc by importing its symbols to use them with the default, System (libc) global allocator. This PR switches its global alloc to `tikv-jemallocator`, which correctly uses sized deallocation (https://docs.rs/tikv-jemallocator/0.4.1/src/tikv_jemallocator/lib.rs.html#121-126). `tikv-jemallocator`, as far as I can tell, is a more up-to-date set of bindings to jemalloc than `jemallocator` The perf results of this pr are in large part due to the version upgrade of jemalloc, but sized deallocation has a non-trivial improvement, particularly to rustdoc. This pr also includes changes to bootstrap to correctly pass the jemalloc feature through to the rustdoc build --- d32238532138485c80db4f2cd596372bce214e00