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Use the first 4 bytes of an OID as hash, instead of full hashing.

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Signed-off-by: Vicent Marti <tanoku@gmail.com>
Signed-off-by: Andreas Ericsson <ae@op5.se>
This commit is contained in:
Vicent Marti 2010-05-28 01:50:59 +02:00 committed by Andreas Ericsson
parent 6bb7aa1318
commit c2550609e3
1 changed files with 1 additions and 21 deletions
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22
src/revobject.c
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@ -30,27 +30,7 @@ const float max_load_factor = 0.65;
unsigned int git_revpool_table__hash(const git_oid *id)
{
const unsigned int m = 0x5bd1e995;
const int r = 24;
unsigned int h = 0xA8A3D5;
int i;
for (i = 0; i < GIT_OID_RAWSZ / 4; ++i) {
unsigned int k = ((unsigned int *)id->id)[i];
k *= m;
k ^= k >> r;
k *= m;
h *= m;
h ^= k;
}
h ^= h >> 13;
h *= m;
h ^= h >> 15;
return h;
return *((unsigned int *)id->id);
}
git_revpool_table *git_revpool_table_create(unsigned int min_size)