Hi, If you put down "Javascript optimization" on google then you will find lots of posts and tutorial about it , All tutorials will tell you about not use array and some functions blah..blah..
But,I will tell you very simple trick, It is a simple rule that says "PUT YOUR .JS DOWN".
Most of us are used to put .js files between <head> and </head> tags, but if you want to improve your perforamance little then put your all .js file at the end of html file befor </body> tag ends.
When your html page render by any engine, then it will starts from top and goes to end.Most of javascript about 80% are event based by user and it must be load after page loading, so when you put all .js at end, it will try to display all html content rather to load javascripts.
So, Happy Javascripting...
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