: A HOWTO on Optimizing PHP with tips and methodologies. Last revised 30 Oct 2009.
The benchmarks may be out of date, but the general advice is still good. I have revised the caching sections as 8 years of experience has shown it is the most critical part of high performance: I have added discussions of squid and memcache. If you want to see what has changed, search for this date in this article. If you like this article, visit my blog, PHP Everywhere for related articles. A HOWTO on Optimizing PHP. Tuning Apache and PHP for Speed on Unix. Tuning Apache and PHP for Speed on Unix Last modified: 24 Mar 2006.
Search for this date in text to see latest updates. Here is my compilation of tips on how to optimise Apache on Linux for PHP and CGI programs. These tips can also apply to Perl and Python. Links will open in a new window.