code profiler

ok this may be a bit offtopic, but here goes i am searching for a PHP code profiler, something to measure key components of the PHP scripts, tracking how many function calls are preformed in the code, the cost of each of the functions in terms of cpu cycles and memory usage, minimal, maximum, and average, etc, basically to help me optimise my code and maybe make some nice statistics along with that.. as far my search has been unsucessfull, i did come to find an old message from [php-dev] list, from a "Brian Moore" and i tried to contact him with no luck, and not beeing able to chase up anything on the subject.. http://www.zend.com/lists/php-dev/200108/msg01181.html and i did find some old (read 3.0.16 version php) profilers on sourceforge/freshmeat are there any plans to have that in latest versions of php in a module or similar? something run-time would be also great, so i can get the profile with php, after the code finished executing.. this was posted on php-dev since it should involve somekind of more lowlevel php coding, so i guess this is a feature request... and it probablly gets the same audience as bugs.php.net so, any info where i can start if i want to profile my php code? (or how i can start developing and extension, if php lets you go that deep into the scripting engine with its extensions) regards, black