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PH: Insert-below-min fast-path.

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David Goldblatt 2021-07-26 13:51:38 -07:00 committed by David Goldblatt
parent 40d53e007c
commit dae24589bc
1 changed files with 14 additions and 0 deletions
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14
include/jemalloc/internal/ph.h
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@ -319,6 +319,20 @@ ph_insert(ph_t *ph, void *phn, size_t offset, ph_cmp_t cmp) {
if (ph->root == NULL) { if (ph->root == NULL) {
ph->root = phn; ph->root = phn;
} else { } else {
/*
* As a special case, check to see if we can replace the root.
* This is practically common in some important cases, and lets
* us defer some insertions (hopefully, until the point where
* some of the items in the aux list have been removed, savings
* us from linking them at all).
*/
if (cmp(phn, ph->root) < 0) {
phn_lchild_set(phn, ph->root, offset);
phn_prev_set(ph->root, phn, offset);
ph->root = phn;
ph->auxcount = 0;
return;
}
ph->auxcount++; ph->auxcount++;
phn_next_set(phn, phn_next_get(ph->root, offset), offset); phn_next_set(phn, phn_next_get(ph->root, offset), offset);
if (phn_next_get(ph->root, offset) != NULL) { if (phn_next_get(ph->root, offset) != NULL) {