I think that my server became slow since I installed XDebug.
So, in order to test my hypothesis I want to disable XDebug completely.
I've been searching for tutorials on how to do this but I can't find such information.
php.ini and look for XDebug.
Set xdebug autostart to false
Disable your profiller
Check out this post XDebug, how to disable remote debugging for single .php file?