Mercurial > hg
view contrib/chg/util.h @ 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 | 9724f54923ec |
children |
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/* * Utility functions * * Copyright (c) 2011 Yuya Nishihara <yuya@tcha.org> * * This software may be used and distributed according to the terms of the * GNU General Public License version 2 or any later version. */ #ifndef UTIL_H_ #define UTIL_H_ #ifdef __GNUC__ #define PRINTF_FORMAT_ __attribute__((format(printf, 1, 2))) #define UNUSED_ __attribute__((unused)) #else #define PRINTF_FORMAT_ #define UNUSED_ #endif void abortmsg(const char *fmt, ...) PRINTF_FORMAT_; void abortmsgerrno(const char *fmt, ...) PRINTF_FORMAT_; void enablecolor(void); void enabledebugmsg(void); void debugmsg(const char *fmt, ...) PRINTF_FORMAT_; void fchdirx(int dirfd); void fsetcloexec(int fd); void *mallocx(size_t size); void *reallocx(void *ptr, size_t size); int runshellcmd(const char *cmd, const char *envp[], const char *cwd); #endif /* UTIL_H_ */