My previous post about using Silex and AppServer-in-PHP similarly to ExpressJS generate quite a bit of interest. In the Hacker News thread there was a question about memory usage, and so I put the AppServer under siege. Memory usage stayed constant at:
13958 bergie 20 0 125m 10m 2136 S 1 0.6 0:00.28 php 13959 bergie 20 0 125m 10m 2136 S 1 0.6 0:00.31 php
Then I did the same Siege for the ExpressJS version:
14051 bergie 20 0 615m 12m 4988 S 0 0.7 0:00.34 node
The PHP implementation served 3.80 requests per second, while the Node.js version served 3.79, both on 11" MacBook Air with Ubuntu 11.04.
This trivial example isn't obviously the big test of PHP app serving vs. Node.js, but at least I was surprised that PHP did better than Node here.
Source: http://bergie.iki.fi/blog/php_can_perform_better_than_node-js/
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