Mercurial > hg
view CONTRIBUTING @ 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> |
|---|---|
| date | Sat, 13 Mar 2021 08:59:03 +0100 |
| parents | a492610a2fc1 |
| children |
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