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nghttp2_hd: Search dynamic table first

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Since recently used headers are in dynamic header table, it is
advantageous to search dynamic table first, saving time to search
through static table.
This commit is contained in:
Tatsuhiro Tsujikawa 2014-09-27 23:08:14 +09:00
parent 34413d8d7c
commit b48ceac56c
1 changed files with 21 additions and 18 deletions
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39
lib/nghttp2_hd.c
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@ -842,6 +842,27 @@ static search_result search_hd_table(nghttp2_hd_context *context,
size_t i;
int use_index = (nv->flags & NGHTTP2_NV_FLAG_NO_INDEX) == 0;
/* Search dynamic table first, so that we can find recently used
entry first */
if(use_index) {
for(i = 0; i < context->hd_table.len; ++i) {
nghttp2_hd_entry *ent = hd_ringbuf_get(&context->hd_table, i);
if(ent->name_hash != name_hash || !name_eq(&ent->nv, nv)) {
continue;
}
if(res.index == -1) {
res.index = (ssize_t)(i + NGHTTP2_STATIC_TABLE_LENGTH);
}
if(ent->value_hash == value_hash && value_eq(&ent->nv, nv)) {
res.index = (ssize_t)(i + NGHTTP2_STATIC_TABLE_LENGTH);
res.name_value_match = 1;
return res;
}
}
}
for(i = 0; i < NGHTTP2_STATIC_TABLE_LENGTH; ++i) {
nghttp2_hd_entry *ent = &static_table[i];
if(ent->name_hash != name_hash || !name_eq(&ent->nv, nv)) {
@ -860,24 +881,6 @@ static search_result search_hd_table(nghttp2_hd_context *context,
}
}
if(!use_index) {
return res;
}
for(i = 0; i < context->hd_table.len; ++i) {
nghttp2_hd_entry *ent = hd_ringbuf_get(&context->hd_table, i);
if(ent->name_hash == name_hash && name_eq(&ent->nv, nv)) {
if(res.index == -1) {
res.index = (ssize_t)(i + NGHTTP2_STATIC_TABLE_LENGTH);
}
if(ent->value_hash == value_hash && value_eq(&ent->nv, nv)) {
res.index = (ssize_t)(i + NGHTTP2_STATIC_TABLE_LENGTH);
res.name_value_match = 1;
return res;
}
}
}
return res;
}