Hi,
Since my WordPress blog was loading quite slowly, but mostly because it was fun, I benchmarked and optimized my website with a range of free open-source tools. I made much use of Webpagetest.org, as it gives a lot of information.
Please let me know if you find this useful, and if you agree with the conclusions that I draw:
[url=http://thijs.elenbaas.net/2013/04/analyzing-and-optimizing-performance-wordpress-website/]http://thijs.elenbaas.net/2013/04/analyzing-and-optimizing-performance-wordpress-website/[/url]