Mercurial > hg
view rust/.cargo/config @ 46775:c94fa884240b
rust: Preallocate the returned `Vec` in `utils::files::relativize_path`
Profiling `rhg files > /dev/null` on an old snapshot of mozilla-central
(with `perf` and the Firefox Profiler:
https://github.com/firefox-devtools/profiler/blob/main/docs-user/guide-perf-profiling.md)
showed non-trivial time spend in this function and in `realloc`.
This change makes the wall-clock time for that process on my machine
go from ~190 ms to ~150 ms.
Differential Revision: https://phab.mercurial-scm.org/D10199
author | Simon Sapin <simon.sapin@octobus.net> |
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date | Sat, 13 Mar 2021 08:59:03 +0100 |
parents | 964212780daf |
children |
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# Rust builds with a modern MSVC and uses a newer CRT. # Python 2.7 has a shared library dependency on an older CRT (msvcr90.dll). # We statically link the modern CRT to avoid multiple msvcr*.dll libraries # being loaded and Python possibly picking up symbols from the newer runtime # (which would be loaded first). [target.'cfg(target_os = "windows")'] rustflags = ["-Ctarget-feature=+crt-static"]