mirror of
https://github.com/git/git.git
synced 2024-11-16 14:04:52 +01:00
d9bae1a178
Running a textconv filter can take a long time. It's particularly bad for a large file which needs to be spooled to disk, but even for small files, the fork+exec overhead can add up for something like "git log -p". This patch uses the notes-cache mechanism to keep a fast cache of textconv output. Caches are stored in refs/notes/textconv/$x, where $x is the userdiff driver defined in gitattributes. Caching is enabled only if diff.$x.cachetextconv is true. In my test repo, on a commit with 45 jpg and avi files changed and a textconv to show their exif tags: [before] $ time git show >/dev/null real 0m13.724s user 0m12.057s sys 0m1.624s [after, first run] $ git config diff.mfo.cachetextconv true $ time git show >/dev/null real 0m14.252s user 0m12.197s sys 0m1.800s [after, subsequent runs] $ time git show >/dev/null real 0m0.352s user 0m0.148s sys 0m0.200s So for a slight (3.8%) cost on the first run, we achieve an almost 40x speed up on subsequent runs. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
26 lines
566 B
C
26 lines
566 B
C
#ifndef USERDIFF_H
|
|
#define USERDIFF_H
|
|
|
|
#include "notes-cache.h"
|
|
|
|
struct userdiff_funcname {
|
|
const char *pattern;
|
|
int cflags;
|
|
};
|
|
|
|
struct userdiff_driver {
|
|
const char *name;
|
|
const char *external;
|
|
int binary;
|
|
struct userdiff_funcname funcname;
|
|
const char *word_regex;
|
|
const char *textconv;
|
|
struct notes_cache *textconv_cache;
|
|
int textconv_want_cache;
|
|
};
|
|
|
|
int userdiff_config(const char *k, const char *v);
|
|
struct userdiff_driver *userdiff_find_by_name(const char *name);
|
|
struct userdiff_driver *userdiff_find_by_path(const char *path);
|
|
|
|
#endif /* USERDIFF */
|