Oliver Nassar

There are tons of optimization/performance logging tools out there. Most frameworks (cake, CI) have their own, and I'm a big fan of pQp, for no other reason that it's clean and nice to look at.

For the most part, though, I've always relied on my own practices. Spitting out the number of db queries (inserts, selects, explains, etc.), memcached hits, apc hits, global variables hits, memory usage, etc. etc. is something I do often and monitor non-stop during development.