JS div/mult benchmark

// test if division is faster then multiplying and substracting
function benchmark(){
    // all variables will be created before testing
        var i = 0;
        var result = 0;
        var date = 0;
        var time1 = 0;
        var time2 = 0;
        var end = 0;
        var start = 0;
        var rounds = 20; // how many times run the test for average time?
        var tries = 10000000; // how many times run the one computation?

        for (var n = 0; n<rounds;n++){

                result = 0;
        // save start date
                date = new Date();
                start = date.getMilliseconds();

        // compute
                for(i; i<tries;i++){
                        result = 10/2;
                }

        // save end date
                date = new Date();
                end = date.getMilliseconds();
                time1+=end-start; // save used time

        // reset variables
                i = 0;
                result = 0;
        // save start date
                date = new Date();
                start = date.getMilliseconds();

        // compute
                for(i; i<tries;i++){
                        result = 10*2;
                }

        // save end date
                date = new Date();
                end = date.getMilliseconds();

        // save used date
                time2 += end-start;
        }
    // show result
        console.log("Divising took "+time1/rounds+" (overal "+time1+") ms. Multiplying took "+time2/rounds+" (overal "+time2+") ms.")
}