Performance testing JS

speedTestJS

(function(global){

    var testFunc = function testFunc(func){
        var start = new Date();
        func();
        return new Date() - start;
        },

        speedTest = function speedTest(name, func){
            var numOfTimes = 1000,
                times = 0;

            for(var i = 0; i < numOfTimes; i++){
                times = times+testFunc(func);
            }
            console.log(name+': '+(times/numOfTimes)+'ms average over '+numOfTimes+' iterations');

        };

    global.speedTest = speedTest;

})(this);