My Favorite Online Tools to Check Website Performance

This is My Favorite Online Tools to Check Website Performance, help me indentify which part need to optimized:

1. Speed test & performance test: http://gtmetrix.com/

2. Http compression test : http://www.whatsmyip.org/http-compression-test/

3. Page load test with waterfall charts feature : http://www.webpagetest.org/

 

cool guy, less talk :p haha