jfbus writes "PHP, like all scripting languages, suffers from having to parse all script files each time a page is displayed. Accelerators (opcode caches) are necessary to speed PHP enough for large websites. Here is a benchmark of the major PHP accelerators (Zend platform, apc and eAccelerator)."
The 11 is for people with the pride of a 10 and the pocketbook of an 8.
-- R.B. Greenberg [referring to PDPs?]