var vs getElementById

JavaScript performance comparison

Test case created by ThinkingStiff

Preparation code

<div id="div"></div>

Preparation code output

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Testing in unknown unknown
Test Ops/sec
var
 
var div = document.getElementById( 'div' );
div.addEventListener( 'click', function () {}, false );
div.addEventListener( 'mousedown', function () {}, false );
div.addEventListener( 'keydown', function () {}, false );
 
 pending…
getElementById()
 
document.getElementById( 'div' ).addEventListener( 'click', function () {}, false );
document.getElementById( 'div' ).addEventListener( 'mousedown', function () {}, false );
document.getElementById( 'div' ).addEventListener( 'keydown', function () {}, false );
 pending…

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