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Reduced CPU load with PHP 5 vs PHP 4

Flickr admin have an interesting WebOps Visualizations Pool and they posted something fascinating. After switching to PHP 5 last week (I am assuming 5.2.9 from 4.4.9) they immediately noticed a reduction in CPU load. They claim the number of Apache connections per second remained persistant after the switch so it was not simply because of a reduction in traffic.

If PHP 5.3 doesn’t go final/gold anytime soon I may just have to try the RC.

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