Upgrading to Symfony 2.6.0 I experience slower delivery of every page in our project. The drag is always around 100 ms, which is a lot more than the same call takes with 2.5.7.

The profiler shows the "controller" section as the only difference. Apart from a 203 ms to 305 ms difference there is also a memory increase from 6 to 19 MB.

Before I go into debugging our own code and stripping it down to a minimum working example: Is anybody else experiencing this or might have a clue what could cause this?