_spBodyOnLoadFunctions.md

Today an interesting conversation arose on Twitter between me and Hugh Wood about _spBodyOnLoadFunctions.push. I tested the _spBodyOnLoadFunctions vs jQuery(document).ready and $(window).load. Here are the results:

• _jQuery document.ready. Time: 54 default-empty.aspx:495
• _spBodyOnLoadFunctions. Time: 337 default-empty.aspx:493
• jQuery window load. Time: 459

_spBodyOnLoadFunctions_test.js

var startedTime = new Date().getTime();

var getMilliSecondsSinceStart = function() {
    return new Date().getTime() - startedTime;
}
_spBodyOnLoadFunctions.push(function() { console.log("_spBodyOnLoadFunctions. Time: ", getMilliSecondsSinceStart() ) ; });

jQuery(document).on("ready", function() { console.log("_jQuery document.ready. Time: ", getMilliSecondsSinceStart() ) });

jQuery(window).on("load", function() { console.log("jQuery window load. Time: ", getMilliSecondsSinceStart()  ); });