On his ThisLab blog, Fred Wu has posted some quick benchmarks comparing some of the popular frameworks out there - Ruby on Rails/Passenger versus CodeIgniter/Kohana.

Last few days I have been playing with Ruby and Rails, again. Today, when someone was asking on a forum about the efficiency of web frameworks, I thought I'd give the few frameworks I work with some more benchmark testing.

His benchmarking is based on basic "Hello World" page requests for each of the frameworks. His results were interesting with CodeIgniter coming out with the fewest number of requests responded to (per second) and Rails coming out on top by a margin of about eighty or ninety over CodeIgniter/Kohana.

On the ThisLab website, they've posted their comparison of two PHP frameworks, both based on some of the same code - CodeIgniter and Kohana.

I began hunting for PHP frameworks ever since Ruby on Rails hit the street. [...] I did a lot of searches, and researches, and finally I was happy to see CodeIgniter.

CodeIgniter has progressed well and gained many web developers' trust, despite a few glitches. One of which was the spawn of the fork: Kohana.

He points out the Wikipedia page showing some of the differences but the real interest in this post is the more than complete table directly comparing the two frameworks (specific versions of each). Items compared on include supported databases, community, conventions, caching, web service support and unit testing integration.