At Google I/O 2010, Google presented Google Chrome's Developer Tools, that set apart our tools in helping developers become more productive.
- CPU profiler captures state of your app at a rate of 1,000 samples per second without modifications to running optimized machine code. resulting tree view makes it easy to find out where to focus efforts on speeding up web app:
Also covered a number of general Inspector improvements in the WebKit:
More Info: DevTools