This is just a quick benchmark of WordPress release 2.8.6, 2.9.2, 3.0.6, 3.1.4 and 3.2.
The test was done on a 512MB rackspace instance, running Ubuntu 10.10. With the following packages installed with default configuration: libapache2-mod-php5 mysql-server php5-mysql. Benchmark was done with ab, doing 10 000 requests to the front page, over 10 concurrent connections.
This is the result, in requests delivered per second:

Clearly, speed isn’t that much improved with the release of 3.2. However, this benchmark only tested the front page with the sample post.




