getElementById wrapper function · jsPerf

JavaScript performance comparison Test case created by azu on 2012-1-15 Preparation code <div> <div> <div> <div> <div id="target"> </div> </div> </div> </div> </div> <script> Benchmark.prototype.setup = function() { var $1 = document.getElementById.bind(document); var $2 = function(id) { return document.getElementById(id); }; var $3 = document.getElementById; }; </script> Preparation code output

[teramako]

bindは総じて遅いようだ。速いかと思ってた...。