https://developers.google.com/speed/articles/optimizing-javascript
http://developer.yahoo.com/performance/rules.html
http://www.oschina.net/question/947192_89619
http://blog.monitis.com/index.php/2011/05/15/30-tips-to-improve-javascript-performance/
http://www.websiteoptimization.com/speed/10/
https://www.ibm.com/developerworks/cn/web/wa-aj-jsajaxperf/
http://www.ibm.com/developerworks/cn/web/wa-aj-mobileajax/
http://www.javatang.com/archives/2008/04/13/0212267.html
http://www.cnblogs.com/meteoric_cry/archive/2010/09/08/1821162.html