symfony/symfony — pull request #2597 by drak (2011-11-10 09:32:18+00:00)
Title: [EventDispatcher] Optimized doDispatch() and removed unused argument.

`call_func_array_func()` is notoriously slow.

There are several famous references for this:

http://paul-m-jones.com/archives/182
http://akrabat.com/php/php-5-3-is-quicker-than-php-5-2-2/
http://www.garfieldtech.com/blog/benchmarking-magic [see under Functions]