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)."
"We are on the verge: Today our program proved Fermat's next-to-last theorem."
-- Epigrams in Programming, ACM SIGPLAN Sept. 1982