http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html
http://book.douban.com/subject/3132277/
http://book.douban.com/subject/3924175/
http://read.douban.com/ebook/1410608/
http://optimizeasp.net/remove-whitespace-from-html
http://www.cnblogs.com/jsfans/archive/2011/09/26/2191253.html
http://www.codeproject.com/Tips/655643/JavaScript-Performance-Tips-Part-2
http://www.cnblogs.com/skylaugh/archive/2013/08/23/3277899.html