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Use memcmp() rather than strncmp() when shorter string length is known.

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It appears that this will be faster for all but the shortest strings;
at least one some platforms, memcmp() can use word-at-a-time comparisons.

Noah Misch, somewhat pared down.
This commit is contained in:
Robert Haas
2010-12-21 22:11:40 -05:00
parent c5160b7eec
commit 32ba2b5160
7 changed files with 33 additions and 33 deletions
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8
contrib/hstore/hstore_io.c
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@ -280,9 +280,9 @@ comparePairs(const void *a, const void *b)
{
if (((Pairs *) a)->keylen == ((Pairs *) b)->keylen)
{
int res = strncmp(((Pairs *) a)->key,
((Pairs *) b)->key,
((Pairs *) a)->keylen);
int res = memcmp(((Pairs *) a)->key,
((Pairs *) b)->key,
((Pairs *) a)->keylen);
if (res)
return res;
@ -324,7 +324,7 @@ hstoreUniquePairs(Pairs *a, int4 l, int4 *buflen)
while (ptr - a < l)
{
if (ptr->keylen == res->keylen &&
strncmp(ptr->key, res->key, res->keylen) == 0)
memcmp(ptr->key, res->key, res->keylen) == 0)
{
if (ptr->needfree)
{