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synced 2025-07-27 12:41:57 +03:00
Use memcmp() rather than strncmp() when shorter string length is known.
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.
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@ -546,7 +546,7 @@ gist_tqcmp(ltree *t, lquery *q)
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while (an > 0 && bn > 0)
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{
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bl = LQL_FIRST(ql);
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if ((res = strncmp(al->name, bl->name, Min(al->len, bl->len))) == 0)
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if ((res = memcmp(al->name, bl->name, Min(al->len, bl->len))) == 0)
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{
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if (al->len != bl->len)
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return al->len - bl->len;
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@ -68,7 +68,7 @@ ltree_compare(const ltree *a, const ltree *b)
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while (an > 0 && bn > 0)
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{
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if ((res = strncmp(al->name, bl->name, Min(al->len, bl->len))) == 0)
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if ((res = memcmp(al->name, bl->name, Min(al->len, bl->len))) == 0)
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{
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if (al->len != bl->len)
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return (al->len - bl->len) * 10 * (an + 1);
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@ -165,7 +165,7 @@ inner_isparent(const ltree *c, const ltree *p)
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{
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if (cl->len != pl->len)
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return false;
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if (strncmp(cl->name, pl->name, cl->len))
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if (memcmp(cl->name, pl->name, cl->len))
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return false;
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pn--;
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@ -373,7 +373,7 @@ ltree_index(PG_FUNCTION_ARGS)
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bptr = LTREE_FIRST(b);
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for (j = 0; j < b->numlevel; j++)
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{
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if (!(aptr->len == bptr->len && strncmp(aptr->name, bptr->name, aptr->len) == 0))
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if (!(aptr->len == bptr->len && memcmp(aptr->name, bptr->name, aptr->len) == 0))
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break;
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aptr = LEVEL_NEXT(aptr);
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bptr = LEVEL_NEXT(bptr);
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@ -451,7 +451,7 @@ lca_inner(ltree **a, int len)
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num = 0;
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for (i = 0; i < Min(tmp, (*ptr)->numlevel - 1); i++)
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{
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if (l1->len == l2->len && strncmp(l1->name, l2->name, l1->len) == 0)
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if (l1->len == l2->len && memcmp(l1->name, l2->name, l1->len) == 0)
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num = i + 1;
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else
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break;
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