[PATCH v2 1/7] name-hash: specify initial size for istate.dir_hash table
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- git@jeffhostetler.com <git@jeffhostetler.com>
- Date
- Mar 23, 2017, 13:46 UTC
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From: Jeff Hostetler <jeffhost@microsoft.com>
Specify an initial size for the istate.dir_hash HashMap matching the size of the istate.name_hash.
Previously hashmap_init() was given 0, causing a 64 bucket hashmap to be created. When working with very large repositories, this would cause numerous rehash() calls to realloc and rebalance the hashmap. This is especially true when the worktree is deep, with many directories containing a few files.
Signed-off-by: Jeff Hostetler <jeffhost@microsoft.com> --- name-hash.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/name-hash.c b/name-hash.c index 6d9f23e..3f7722a 100644 --- a/name-hash.c +++ b/name-hash.c @@ -120,7 +120,8 @@ static void lazy_init_name_hash(struct index_state *istate) return; hashmap_init(&istate->name_hash, (hashmap_cmp_fn) cache_entry_cmp, istate->cache_nr); - hashmap_init(&istate->dir_hash, (hashmap_cmp_fn) dir_entry_cmp, 0); + hashmap_init(&istate->dir_hash, (hashmap_cmp_fn) dir_entry_cmp, + istate->cache_nr); for (nr = 0; nr < istate->cache_nr; nr++) hash_index_entry(istate, istate->cache[nr]); istate->name_hash_initialized = 1;
-- 2.7.4