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speed up ngx_http_charset_recode() for 25%: google-perftools reported

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that CPU usage of charset body filter has decreased from 7.5% to 5.5%
if gzipping is disabled
This commit is contained in:
Igor Sysoev 2008-03-16 16:52:15 +00:00
parent 70d0961658
commit 430db103f6
1 changed files with 21 additions and 13 deletions
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34
src/http/modules/ngx_http_charset_filter_module.c
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@ -561,25 +561,33 @@ ngx_http_charset_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
static ngx_uint_t static ngx_uint_t
ngx_http_charset_recode(ngx_buf_t *b, u_char *table) ngx_http_charset_recode(ngx_buf_t *b, u_char *table)
{ {
u_char *p; u_char *p, *last;
for (p = b->pos; p < b->last; p++) { last = b->last;
if (*p == table[*p]) { for (p = b->pos; p < last; p++) {
continue;
if (*p != table[*p]) {
goto recode;
} }
while (p < b->last) {
*p = table[*p];
p++;
}
b->in_file = 0;
return 1;
} }
return 0; return 0;
recode:
do {
if (*p != table[*p]) {
*p = table[*p];
}
p++;
} while (p < last);
b->in_file = 0;
return 1;
} }