Rails - Jun 2006 - Article by Stefan Kaes about Rails performance, on InfoQ

Not sure if anyone else has pointed this out, but there''s a useful 
article on Rails performance, "A Look at Common Performance Problems in 
Rails" here:

   http://www.infoq.com/articles/Rails-Performance

written by Stefan Kaes, who has done most of the performance analysis 
and tuning on the Rails framework.

regards

   Justin