Info

http://stackoverflow.com/questions/14407099/why-those-javascript-snippets-perform-the-same#14407099

Preparation code

 
<script>
  Benchmark.prototype.setup = function() {
    obj = [1,2,3,4,5];
    function iter(){
        for (var key in obj){
            key=key+key;
        };
    };
    function test1() { 
        iter(obj); 
    };
    function test2(){
        (function iter(obj){
            for (var key in obj){
                key=key+key;
            };
        })(obj);    
    };
  };
</script>

Test runner

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test1()
 

test2()

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Revisions

You can edit these tests or add even more tests to this page by appending /edit to the URL. Here’s a list of current revisions for this page:

• Revision 1: published on 18th January 2013
• Revision 2: published on 18th January 2013

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