benchmark.js

var Benchmark = new Object();
Benchmark.listeners = new Array();

Benchmark.listener = function() {
    this.startTimes = new Array();
    this.endTimes = new Array();

    this.getSec = function() {
        var d = new Date();
        return d.getTime();
    };

    this.setStartTime = function() {
        var d = new Date();
        this.startTimes.push(d.getTime());
    };
    this.setEndTime = function() {
        var d = new Date();
        this.endTimes.push(d.getTime());
    };

    this.getDelay1 = function(i) {
        var a = this.startTimes.length;
        var b = this.endTimes.length;
        if(!i || i>=a || i>=b) var i = (a<=b?a:b)-1;
        return this.endTimes[i]-this.startTimes[i];
    };
    this.getDelay2 = function(i) {
        var a = this.startTimes.length;
        if(!i || i>=a) i=a-1;
        return this.startTimes[i]-this.startTimes[i-1];
    };
    this.getDelay3 = function(i) {
        var b = this.endTimes.length;
        if(!i || i>=b) i=b-1;
        return this.endTimes[i]-this.endTimes[i-1];
    };
    this.getAvgDelay1 = function(n) {
        var a = this.startTimes.length;
        var b = this.endTimes.length;
        var e = (a<=b?a:b); //end index

        var c=0;//counter
        var s=0;//summa

        if(!n || n>= e || n<0) var n = e;
        var i = e-n; // start index
        while(i<e) {
            if(i>0) {
                s+=(this.endTimes[i]-this.startTimes[i]);
                ++c;
            }
            ++i;
        }

        return (s/c);
    };

    this.getAvgDelay2 = function(n) {
        var a = this.startTimes.length;
        var e = a; //end index

        var c=0;//counter
        var s=0;//summa

        if(!n || n>= e || n<0) var n = e;
        var i = e-n; // start index
        while(i<e) {
            if(i>0) {
                s+=(this.startTimes[i]-this.startTimes[i-1]);
                ++c;
            }
            ++i;
        }

        return 1/(s/c/1000);
    };


    this.getAvgDelay3 = function(n) {
        var b = this.startTimes.length;
        var e = b; //end index

        var c=0;//counter
        var s=0;//summa

        if(!n || n>= e || n<0) var n = e;
        var i = e-n; // start index
        while(i<e) {
            if(i>0) {
                s+=(this.endTimes[i]-this.endTimes[i-1]);
                ++c;
            }
            ++i;
        }

        return s/c;
    };
}

Benchmark.addListener = function() {
    var listener = new Benchmark.listener()
    Benchmark.listeners.push(listener);
    return listener;
};