WordPress 3 was released today, I’ve previously benchmarked beta 1 and beta 2 but now it’s time to test the real thing.

The test was done on a 512MB rackspace instance, running Ubuntu 10.04. With the following packages installed with default configuration: libapache2-mod-php5 mysql-server php5-mysql. Benchmark was done with ab, doing 10 000 requests over 10 concurrent connections. This is the result, in requests delivered per second:

The WordPress installations only contained the default sample post with one comment.

It doesn’t come as a chock that with more functionality comes more complex (slower) code. But with that said, it’s also sad to lose around 15 % of the performance. The impact, however, should be minimal if a good cache plugin is used.