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Optimize DOM property access (#15626)

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For the read and write implementation, store the handler pointer in the
first cache slot.
For the write implementation, use the second cache slot to store the
property info.

For a micro-benchmark that performs a write:
```php
$dom = new DOMDocument;
for ($i=0;$i<9999999;$i++)
        $dom->strictErrorChecking = false;
```

I obtain the following results on an i7-4790:

```
  ./sapi/cli/php ./write.php ran
    1.42 ± 0.08 times faster than ./sapi/cli/php_old ./write.php
```

For a micro-benchmark that performs a read:
```php
$dom = new DOMDocument;
for ($i=0;$i<9999999;$i++)
        $dom->strictErrorChecking;
```

I obtain the following results on the same machine:

```
  ./sapi/cli/php ./read.php ran
    1.29 ± 0.13 times faster than ./sapi/cli/php_old ./read.php
```
This commit is contained in:
Niels Dossche
2024-08-29 20:13:29 +02:00
committed by GitHub
parent 0268cb0343
commit 367f303efa
1 changed files with 33 additions and 12 deletions
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45
ext/dom/php_dom.c
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@@ -365,16 +365,31 @@ static zval *dom_get_property_ptr_ptr(zend_object *object, zend_string *name, in
return NULL;
}
static zend_always_inline const dom_prop_handler *dom_get_prop_handler(const dom_object *obj, zend_string *name, void **cache_slot)
{
const dom_prop_handler *hnd = NULL;
if (obj->prop_handler != NULL) {
if (cache_slot) {
hnd = *cache_slot;
}
if (!hnd) {
hnd = zend_hash_find_ptr(obj->prop_handler, name);
if (cache_slot) {
*cache_slot = (void *) hnd;
}
}
}
return hnd;
}
/* {{{ dom_read_property */
zval *dom_read_property(zend_object *object, zend_string *name, int type, void **cache_slot, zval *rv)
{
dom_object *obj = php_dom_obj_from_obj(object);
zval *retval;
dom_prop_handler *hnd = NULL;
if (obj->prop_handler != NULL) {
hnd = zend_hash_find_ptr(obj->prop_handler, name);
}
const dom_prop_handler *hnd = dom_get_prop_handler(obj, name, cache_slot);
if (hnd) {
int ret = hnd->read_func(obj, rv);
@@ -394,19 +409,25 @@ zval *dom_read_property(zend_object *object, zend_string *name, int type, void *
zval *dom_write_property(zend_object *object, zend_string *name, zval *value, void **cache_slot)
{
dom_object *obj = php_dom_obj_from_obj(object);
dom_prop_handler *hnd = NULL;
if (obj->prop_handler != NULL) {
hnd = zend_hash_find_ptr(obj->prop_handler, name);
}
const dom_prop_handler *hnd = dom_get_prop_handler(obj, name, cache_slot);
if (hnd) {
if (!hnd->write_func) {
if (UNEXPECTED(!hnd->write_func)) {
zend_readonly_property_modification_error_ex(ZSTR_VAL(object->ce->name), ZSTR_VAL(name));
return &EG(error_zval);
}
zend_property_info *prop = zend_get_property_info(object->ce, name, /* silent */ true);
zend_property_info *prop = NULL;
if (cache_slot) {
prop = *(cache_slot + 1);
}
if (!prop) {
prop = zend_get_property_info(object->ce, name, /* silent */ true);
if (cache_slot) {
*(cache_slot + 1) = prop;
}
}
ZEND_ASSERT(prop && ZEND_TYPE_IS_SET(prop->type));
zval tmp;
ZVAL_COPY(&tmp, value);