PROFILING CONTROLLERS

Short tutorial how to use xdebug to profile a controller:

1. The first step is to identify slow controllers e.g. via firebug.
2. Get the concrete url including parameters (in firebug there's a right-click option: "Copy Location with Parameters") and append &XDEBUG_PROFILE.
3. Request the url to generate a trace-file which can be used to check for bottleneck. (check http://xdebug.org/docs/profiler for more information)
4. You can find the file at /tmp named cachegrind.out.NUMBER. Open this file with software like kcachegrind and look for the problem.
5. Do performance boosting
6. Repeat steps 3 till 5 until you are satisfied with the speed of your code