mootools timer class

timer.js

var timer = new Class({
    options: {
        pause: 0
    },
    Implements: [Options,Events],
    initialize: function(options) {
        this.setOptions(options);
        this.counter = 0;
    },
    
    startTest: function(fn, runs, label) {
        this.start = new Date();
        
    
        var runs = runs || 1;
        while(runs--) {
            fn.apply(this);
        }
        
        this.end = new Date();
        this.timeElapsed = this.end.getTime() - this.start.getTime();
        this.counter++;
        this.label = label || "n/a";
        this.fireEvent("complete", this);
    
    }
});