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Avoid refcounted copy in _object_properties_init() for internal classes (#12474)

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This currently uses ZVAL_COPY_OR_DUP, which copies the value and handles
refcounting. However, internal classes cannot have refcounted default
properties because of constraints imposed by
zend_declare_typed_property(). So copying the value is sufficient.

While this doesn't really improve the performance for our benchmarks, it
improves performance for cases where a lot of temporary internal objects
are instantiated. For example, when instantiating DOM classes: DOM
objects are transient, so lots of temporary objects are created.
This commit is contained in:
Niels Dossche 2023-10-19 11:34:55 +01:00 • committed by GitHub
parent 7d551a89e5
commit cdfa016854
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2 changed files with 8 additions and 2 deletions
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5
Zend/zend_API.c
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@ -1610,8 +1610,11 @@ static zend_always_inline void _object_properties_init(zend_object *object, zend
zval *end = src + class_type->default_properties_count;
if (UNEXPECTED(class_type->type == ZEND_INTERNAL_CLASS)) {
/* We don't have to account for refcounting because
* zend_declare_typed_property() disallows refcounted defaults for internal classes. */
do {
ZVAL_COPY_OR_DUP_PROP(dst, src);
ZEND_ASSERT(!Z_REFCOUNTED_P(src));
ZVAL_COPY_VALUE_PROP(dst, src);
src++;
dst++;
} while (src != end);