????1.????

?????????????????????????????????????????????????????????????о??????????????????????????????????????????html????????????????????????????????飬?????????????????????????????????????в????????????????????????飬???????λ????????????“??????”??????

????2.?????????

???????????????????????????????????????????yahoo??yslow??google??pagespeed?????yslow??page speed??????firefox??????1???????????????????????????????????????????????????????????????????????????????????????????????dynatrace?????yslow??page speed?????????????

????2.1 yslow

?????????????????35?????????????????μ???????http://developer.yahoo.com/performance/rules.html??

????????????http://developer.yahoo.com/yslow/

??????????У???????к???firefox?з???????????????????????????????15??????????????????????????汾??yslow????????????????A-F???д?????????????????????????????????????

????2.2 page speed

????????????pagespeed????????????29??http://code.google.com/speed/page-speed/docs/rules_intro.html

????????????http://code.google.com/speed/page-speed/download.html

??????????У?pagespeed???????firefox???????google chrome??????????????firefox????page speed????http://www.1688.com????

????2.3 dynatrace ajax edition

????????????????????????????????Cache?????硢Server???JavaScript?????????????A~F???????????????????????????????yslow??page speed????http://community.dynatrace.com/ext/ajax/PUB/Best+Practices+on+Web+Site+Performance+Optimization??

????????????https://www.dynatrace.com

?????????????dynatrace???????firefox??ie??????????????????????????????windows??????dynatrace????????

????3.???????

????3.1dynaTrace Ajax Edition

????dynaTrace Ajax Edition?????????????????????????????yslow??page speed?????????м??????????????

????1)???IE????????????????????????????

????2)???JS???????????????

????3)??????????????????????

????3.2showslow

????showslow??yslow???????????????http://www.showslow.com/??????????????php???????????????firefox??yslow?????page speed???????dynatrace?????????????????????????????????????????????dynatrace???????????Щ???????????????????????showslow??????浵????????????