322 requests/sec         Standard PHP 4.3
 325 requests/sec         Turn on Output Buffering
 325 requests/sec         variables_order from EGPCS to GPC
 345 requests/sec         Compile PHP with non-pic patch
 355 requests/sec         Compile PHP with non-pic and syscall patch
 385 requests/sec         Standard PHP + APC
 425 requests/sec         syscall+nonpic+GPC+APC


Perspective
322 requests/second is 1,159,200/hour or 27,820,800/day.

425 requests/second is 1,530,000/hour or 36,720,000/day.