Firebug is known to make Gmail slow unless it is configured correctly

For the best Gmail performance, Gmail suggests disabling Firebug for Windows or Linux Users To disable Firebug: Click the green or red icon in the bottom right corner of the browser window to open Firebug. Click the bug icon in the top left corner of Firebug and select 'Disable Firebug for' If you'd [...]


40 Tips for Optimizing Your PHP Code

If a method can be static, declare it static. Speed improvement is by a factor of 4. echo is faster than print. Use echo's multiple parameters instead of string concatenation. Set the maxvalue for your for-loops before and not in the loop. Unset your variables to free memory, especially large arrays. Avoid magic like __get, [...]