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speed up refresh_index() by utilizing preload_index()

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Speed up refresh_index() by utilizing preload_index() to do most of the work
spread across multiple threads.  This works because most cache entries will
get marked CE_UPTODATE so that refresh_cache_ent() can bail out early when
called from within refresh_index().

On a Windows repo with ~200K files, this drops refresh times from 6.64
seconds to 2.87 seconds for a savings of 57%.

Signed-off-by: Ben Peart <benpeart@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ben Peart
2018-10-29 16:41:59 -04:00
committed by Junio C Hamano
parent c670b1f876
commit 99ce720c33
3 changed files with 13 additions and 4 deletions
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3
cache.h
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@ -659,6 +659,9 @@ extern int daemonize(void);
/* Initialize and use the cache information */
struct lock_file;
extern int read_index(struct index_state *);
extern void preload_index(struct index_state *index,
const struct pathspec *pathspec,
unsigned int refresh_flags);
extern int read_index_preload(struct index_state *,
const struct pathspec *pathspec,
unsigned int refresh_flags);