Here are some links to useful sources of performance information.
Practical Performance Analyst – This site has much to offer those interested in computer performance work. The person who runs it is remarkably dedicated to making good information available and is also a very nice person. Full disclosure: I have contributed content to the site.
stevesouders.com – Steve knows website performance. I found several informative videos he did here as well as his blog and links to his other books.
High Performance Web Sites – If you are doing any performance work on web sites, you should read Steve Souders’ book. It is beautifully written, and wildly useful.
www.cmgindia.org – A lot of my readers are from India. Since it is always good to support the home team, I’d like to point out there is a CMG India site with some good performance links and information you might find valuable.
http://alexanderpodelko.com/blog/ – I like the way he writes and there are a lot of good links here to the work of other performance gurus.
Mark Tomlinson’s Performance Blog – Dig deep. This blog contains good performance and testing insights in every year. Some of it is serious, some of it is big-picture, and some of it is just fun.
http://www.perfbytes.com/ PerfBytes is a well produced, often funny, always irreverent podcast on all things performance.
http://www.annamacijeski.com/ The person who did the cover design for my book has her own website where you can see her beautiful art and graphic design work.