[NFR] Scope lookup optimizations

[ghost]

zend_do_inheritance() copies all functions from the parent class function table into the inherited class function table. Therefore, if a parent has implemented a function, it will be present in its child's function table.

As a consequence, we don't have to traverse all zend_class_entries and look for the function: if it is defined by a parent, we will see it in our scope.

Thus, if we don't look up the scope, we

• save a call to zend_str_tolower_dup (and emalloc()/efree())
• possibly save a call to zend_inline_hash_func()
• save a call to phalcon_hash_quick_exists()

For usual method calls and static self:: calls we don't need phalcon_find_scope() at all — EG(scope) = Z_OBJCE_P(obj) is sufficient.

For parent calls we only need to check if our class is present in the inheritance of the given this_ptr.
It will be faster to compare zend_class_entries than class names though (I will probably address this later).

[phalcon]

This may break some compatibility with 5.3.0/5.3.1, it seems do_inheritance started working this way since 5.3.3, I think there would not be problem setting 5.3.3 as minimum supported version

[ghost]

Yes, you are right…

[ghost]

Actually I can revert the old behavior for 5.3.[012], if necessary