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Core: slight optimization in ngx_chain_update_chains().

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It is not necessary to traverse *busy and link the *out when *out is NULL.
This commit is contained in:
hucongcong 2016-11-10 10:17:53 +08:00
parent 8e9f1df637
commit 42298aeb13
1 changed files with 9 additions and 7 deletions
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16
src/core/ngx_buf.c
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@ -186,17 +186,19 @@ ngx_chain_update_chains(ngx_pool_t *p, ngx_chain_t **free, ngx_chain_t **busy,
{
ngx_chain_t *cl;
if (*busy == NULL) {
*busy = *out;
if (*out) {
if (*busy == NULL) {
*busy = *out;
} else {
for (cl = *busy; cl->next; cl = cl->next) { /* void */ }
} else {
for (cl = *busy; cl->next; cl = cl->next) { /* void */ }
cl->next = *out;
cl->next = *out;
}
*out = NULL;
}
*out = NULL;
while (*busy) {
cl = *busy;