zendframework/zf2 — pull request #1874 by weierophinney (2012-07-12 22:37:24+00:00)
Title: Optimize isSubclassOf checks

- Suggested by @marc-mabe -- if is_subclass_of() returns true, we can return
immediately. This allows us to skip the version_compare() when it passes.
- Removed Zend\Stdlib\SubClass, as I evidently missed doing so in #1852