PHPBuilder: PHP: The need for speed
March 29, 2001
"One of the greatest advantages when using PHP is obviously speed. ... when you have to face lots of accesses, heavy applications, narrow bandwidth, or other factors that can create performance bottlenecks, you may ask yourself if you can do anything to make things work better. In this article I'll explain what you can do to further improve php performance, and how to make your users' browsing experience even more pleasant."
"... APC (Alternative PHP Cache) is another free caching module available from Community Connect. Seems stable enough for production use, and also seems to speed up things a lot."