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| author | Nguyễn Thái Ngọc Duy <pclouds@gmail.com> | 2013-03-17 10:28:06 +0700 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2013-03-16 22:57:29 -0700 |
| commit | c73592812d36ccc7eccfd0489177970d246fa522 (patch) | |
| tree | 1e92b0c8fb8cb4bf5bbb10f38cf695785457b2e7 /name-hash.c | |
| parent | 03a0fb0ccf48c831060c2243f830b6a12cd8fdf3 (diff) | |
| download | git-c73592812d36ccc7eccfd0489177970d246fa522.tar.gz git-c73592812d36ccc7eccfd0489177970d246fa522.tar.xz | |
Preallocate hash tables when the number of inserts are known in advance
This avoids unnecessary re-allocations and reinsertions. On webkit.git
(i.e. about 182k inserts to the name hash table), this reduces about
100ms out of 3s user time.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'name-hash.c')
| -rw-r--r-- | name-hash.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/name-hash.c b/name-hash.c index d8d25c23e..2a1f10824 100644 --- a/name-hash.c +++ b/name-hash.c @@ -92,6 +92,8 @@ static void lazy_init_name_hash(struct index_state *istate) if (istate->name_hash_initialized) return; + if (istate->cache_nr) + preallocate_hash(&istate->name_hash, istate->cache_nr); for (nr = 0; nr < istate->cache_nr; nr++) hash_index_entry(istate, istate->cache[nr]); istate->name_hash_initialized = 1; |