APC is the Alternative PHP Cache. It was conceived of to provide a free, open, and robust framework for compiling and caching php scripts. This will, and does speed up PHP execution, caching common routines, and making things all-about faster!
My offered revision is merely a prebuilt version with installation instructions, and a diff against 2.0b for Darwin (so you can build from sources). It’s specifically built for use with Marc Liyanage’s prebuilt PHP, version 4.3.4 (revision 1).
You’ll have to read the README included within my package; Darwin doesn’t default into giving up more than 4M of shared memory; instructions within inform you how to (fairly trivially) change this.
Happy PHP coding!