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nghttp2_hd: Search dynamic table first 

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; size_t i;
int use_index = (nv->flags & NGHTTP2_NV_FLAG_NO_INDEX) == 0; 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) { for(i = 0; i < NGHTTP2_STATIC_TABLE_LENGTH; ++i) {
nghttp2_hd_entry *ent = &static_table[i]; nghttp2_hd_entry *ent = &static_table[i];
if(ent->name_hash != name_hash || !name_eq(&ent->nv, nv)) { 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; return res;
} }