The Velocity conference on web performance and operations is in full swing there are a wealth of information in the slides.

Here is a selection of the most interesting presentations:

• AOL PageTest – AOL have created an opensource tool call PageTest to test performance on IE 7/8 and they have created a online page test to show the performance of your website from East coast USA (Slides)
• High performance Ajax application – Yahoo. Another awesome slide deck from the Yahoo performance team. (Slides)
• Improving Netflix performance – Mesuring and testing performance at Netflix (Slides)
• Jiffy open source performance measuring tool - a new tools to measure the performance of your javascript. (Zip of Slides)
• Profiling Dynamic Web Applications in Firebug – (Slides)

Enjoy!