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DZone.com: Speed Up Your PHP Like Facebook

Note: This article was originally published at PHPDeveloper on 21 April 3183.
PHPDeveloper

On DZone.com John Esposito reminds you about another technology Facebook has introduced to the world of PHP (besides HipHop) - XHProf, a PHP profiler.

Facebook did more for PHP: they also created XHProf, a PHP profiler with a (supposedly) easy-to-use HTML interface, designed to pinpoint exactly where your bottlenecks are appearing, so that you can optimize at every stage in the pipeline. [...] If you haven't tried XHProf, you might want to look into it. Installation apparently requires a little nudging, but Nick Lewis just posted a full, practical guide to benchmarking and performance tuning your PHP and MySQL, using XHProf (as well as other techniques) -- a very nice overview of many common bottlenecks and how to open them up.

There's also a link to some Drupal 6 benchmarks that shows how it has helped that project (including both small and large improvements).