https://channel9.msdn.com/Series/Practical-Performance-Tips-to-Make-Your-HTMLJavaScript-Faster/06?WT.mc_id=13400-DEV-sitepoint-article24
https://channel9.msdn.com/Series/Practical-Performance-Tips-to-Make-Your-HTMLJavaScript-Faster/06?WT.mc_id=13400-DEV-sitepoint-article24