FGCOM/jansson
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value, pack: use key length from json_object iternals

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Reduce the number of strlen calls in the jansson backend.

Test on my laptop (count of the instructions)

  Before:
  ❯ valgrind --tool=callgrind ./bin/test_object
  ==3105045== Events    : Ir
  ==3105045== Collected : 441453

  After:
  ❯ valgrind --tool=callgrind ./bin/test_object
  ==3144451== Events    : Ir
  ==3144451== Collected : 440597

Signed-off-by: Maxim Zhukov <mussitantesmortem@gmail.com>
This commit is contained in:
Maxim Zhukov 2021-11-20 21:34:07 +03:00
parent eb81670881
commit 78418c84f1
2 changed files with 19 additions and 12 deletions
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3
src/pack_unpack.c
View File

@ -562,8 +562,7 @@ static int unpack_object(scanner_t *s, json_t *root, va_list *ap) {
long unpacked = 0;
if (gotopt || json_object_size(root) != key_set.size) {
json_object_foreach(root, key, value) {
key_len = strlen(key);
json_object_keylen_foreach(root, key, key_len, value) {
if (!hashtable_get(&key_set, key, key_len)) {
unpacked++;

28
src/value.c
View File

@ -191,13 +191,14 @@ int json_object_clear(json_t *json) {
int json_object_update(json_t *object, json_t *other) {
const char *key;
size_t key_len;
json_t *value;
if (!json_is_object(object) || !json_is_object(other))
return -1;
json_object_foreach(other, key, value) {
if (json_object_set_nocheck(object, key, value))
json_object_keylen_foreach(other, key, key_len, value) {
if (json_object_setn_nocheck(object, key, key_len, value))
return -1;
}
@ -222,14 +223,15 @@ int json_object_update_existing(json_t *object, json_t *other) {
int json_object_update_missing(json_t *object, json_t *other) {
const char *key;
size_t key_len;
json_t *value;
if (!json_is_object(object) || !json_is_object(other))
return -1;
json_object_foreach(other, key, value) {
if (!json_object_get(object, key))
json_object_set_nocheck(object, key, value);
json_object_keylen_foreach(other, key, key_len, value) {
if (!json_object_getn(object, key, key_len))
json_object_setn_nocheck(object, key, key_len, value);
}
return 0;
@ -250,7 +252,7 @@ int do_object_update_recursive(json_t *object, json_t *other, hashtable_t *paren
return -1;
json_object_keylen_foreach(other, key, key_len, value) {
json_t *v = json_object_get(object, key);
json_t *v = json_object_getn(object, key, key_len);
if (json_is_object(v) && json_is_object(value)) {
if (do_object_update_recursive(v, value, parents)) {
@ -352,13 +354,14 @@ void *json_object_key_to_iter(const char *key) {
static int json_object_equal(const json_t *object1, const json_t *object2) {
const char *key;
size_t key_len;
const json_t *value1, *value2;
if (json_object_size(object1) != json_object_size(object2))
return 0;
json_object_foreach((json_t *)object1, key, value1) {
value2 = json_object_get(object2, key);
json_object_keylen_foreach((json_t *)object1, key, key_len, value1) {
value2 = json_object_getn(object2, key, key_len);
if (!json_equal(value1, value2))
return 0;
@ -371,13 +374,15 @@ static json_t *json_object_copy(json_t *object) {
json_t *result;
const char *key;
size_t key_len;
json_t *value;
result = json_object();
if (!result)
return NULL;
json_object_foreach(object, key, value) json_object_set_nocheck(result, key, value);
json_object_keylen_foreach(object, key, key_len, value)
json_object_setn_nocheck(result, key, key_len, value);
return result;
}
@ -400,11 +405,14 @@ static json_t *json_object_deep_copy(const json_t *object, hashtable_t *parents)
iter = json_object_iter((json_t *)object);
while (iter) {
const char *key;
size_t key_len;
const json_t *value;
key = json_object_iter_key(iter);
key_len = json_object_iter_key_len(iter);
value = json_object_iter_value(iter);
if (json_object_set_new_nocheck(result, key, do_deep_copy(value, parents))) {
if (json_object_setn_new_nocheck(result, key, key_len,
do_deep_copy(value, parents))) {
json_decref(result);
result = NULL;
break;