A day in the life of a slow page at Stack Overflow
how a developer profiled and fixed a page with bad queries
2 High Scalability - High Scalability - Facebook at 13 Million Queries Per Second Recommends: Minimize Request Variance
for reference, these are the notes of the talk, but there is a link to the actual talk also.
Optimizing Page Load Time
contains some code for getting page load time in js, as well as some great tips to reduce your site's page loading time. I haven't gone through it all but I wanted to make sure I have a copy of it for the future.
With regards to the advice given in the new PHP speed tips article
Google Groups posting rebutting the statements made in this Google performance tips article. The rest of the discussion is people sharing their own performance tips.
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