Great extensive write-up on how to use Google Chrome Developer Tools’ timeline function to isolate bottlenecks and then addressing them.
An introduction to uptime monitoring vs real user monitoring (RUM) and performance benchmarking by new entrant SpeedCurve – clearly explaining how each of these services are crucial to measuring and improving your site performance. SpeedCurve are looking for beta testers to try out their benchmarking tool which offers great visualisation of your site’s performance against your competitors.
Using some of the tools and methods already linked to here at sitespeed.com.au, ReadWriteWeb outlines some great tips.
A fun tool to compare between two sites to see ‘which loads faster’. Options include testing each site on GTMetrix and multiple loads.
Simple test that breaks down the initial HTTP request by time.
For measuring load times segmented by the request handling.
Great comparison tools for PageSpeed and YSlow that combines the site scores in a web-dashboard, allows multiple site tracking and more.
Rules and documentation from Google on Page Speed