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Optimize dixLookupPrivate for repeated lookups of the same private. 

This gives me a 20% speedup for EXA text rendering, though I still seem to burn
quite a lot of cycles in here...
This commit is contained in:
Michel Dänzer 2008-04-17 16:10:10 +02:00
parent 886af8f384
commit 9b30cc5248
1 changed files with 12 additions and 5 deletions
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15
include/privates.h
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@ -46,13 +46,20 @@ dixAllocatePrivate(PrivateRec **privates, const DevPrivateKey key);
static _X_INLINE pointer
dixLookupPrivate(PrivateRec **privates, const DevPrivateKey key)
{
PrivateRec *rec = *privates;
PrivateRec *rec, *prev;
pointer *ptr;
while (rec) {
if (rec->key == key)
for (rec = *privates, prev = NULL; rec; prev = rec, rec = rec->next) {
if (rec->key != key)
continue;
if (prev) {
prev->next = rec->next;
rec->next = *privates;
*privates = rec;
}
return rec->value;
rec = rec->next;
}
ptr = dixAllocatePrivate(privates, key);