Flickr: The Real World PHP 5 Benchmark

Benchmarks such as the PHP / GCC / ICC Benchmark I posted quite a while ago on this blog are synthetic. They test "raw bytecode execution" speed that cannot be translated into real-world situations per se.

Flickr recently migrated from PHP 4 to PHP 5. And here are their real world numbers:

Drop in CPU usage after migration of Flickr from PHP 4 to PHP 5

Wow.

I am looking forward to John Allspaw's slides from his presentation on "operational efficiency hacks" that he will be giving at next week's Web2.0 Expo.