file_exists - the performance killer....

I recently went into some profiling for one of our apps, because a page was taking more than two minutes to display...

I found, to my surprise, that a call to file_exists (in a loop) was taking 95 percent of that time... Wtf ??? I just cached the result to the call to gain that much time... Good to know !

As a side note, I did the profiling with the latest version of PHPEd (Nusphere), great tool.