I am seeking a way to profile PHP.
Example Scenario
I submit an AJAX request to load an HTML Select box. It takes on the order of 300-400 milliseconds (my human estimation) for AJAX turnaround to complete. That was too long. I have created a simple PHP script just for that one AJAX request and the turn-around was imperceptible.
Just poking around I have concluded that my application's startup sequence is to blame (AJAX request goes through application startup such as security, database, user authentication, etc). I want to optimize it but I can't without more information on performance. There could be some one/two methods that are to blame and I wish to know what those are.
How?
