Mercurial > hg
view contrib/casesmash.py @ 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 | 2372284d9457 |
children | 6000f5b25c9b |
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from __future__ import absolute_import import __builtin__ import os from mercurial import util def lowerwrap(scope, funcname): f = getattr(scope, funcname) def wrap(fname, *args, **kwargs): d, base = os.path.split(fname) try: files = os.listdir(d or '.') except OSError: files = [] if base in files: return f(fname, *args, **kwargs) for fn in files: if fn.lower() == base.lower(): return f(os.path.join(d, fn), *args, **kwargs) return f(fname, *args, **kwargs) scope.__dict__[funcname] = wrap def normcase(path): return path.lower() os.path.normcase = normcase for f in 'file open'.split(): lowerwrap(__builtin__, f) for f in "chmod chown open lstat stat remove unlink".split(): lowerwrap(os, f) for f in "exists lexists".split(): lowerwrap(os.path, f) lowerwrap(util, 'posixfile')