Speed up PHP with APC
A downside to any scripted language is that it is recompiled every time that it is run. CPU cycles are wasted compiling both simple and complicated scripts over and over, regardless if the actual output even changes. What can you do to stop this kind of waste? If you are using PHP, there are quite a few caching mechanisms. I spent most of today trying to get a few of them to work with OpenBSD 4.1 with very little success. One that I did get working was APC.