Small library to do benchmark in javascript

Benchmark.js

var Benchmark = function() {

};

Benchmark.prototype.start = function() {
    this.start = new Date().getTime();
    console.time('Benchmark');
};

Benchmark.prototype.stop = function() {
    this.stop = new Date().getTime();
    console.timeEnd('Benchmark');
};

Benchmark.prototype.read = function() {
    this.data = localStorage.getItem('benchy');
    if(this.data) {
        this.data =  JSON.parse(this.data);
    } else {
        this.data = [];
    }
};

Benchmark.prototype.write = function() {
    this.read();
    this.data.push(this.stop - this.start);
    localStorage.setItem('benchy', JSON.stringify(this.data));
};

Benchmark.prototype.stats = function() {
    this.read();
    console.log(typeof this.data);

    var avg = this.data.reduce(function(prev, curr, index, arr) {
        if(index === arr.length-1) {
            return (prev + curr) / arr.length;
        }
        return prev + curr;
    }, 0);

    console.log('avg: ' + avg + 'ms');
    console.log(this.data);
};

Benchmark.prototype.reset = function() {
    localStorage.setItem('benchy', '[]');
};

Benchmark.prototype.repeat = function(times) {
    this.read();
    if(this.data.length < times) {
        window.location.reload();
    } else {
        this.reset();
    }
};

window.benchy = new Benchmark();

Benchmark.min.js

var Benchmark=function(){};Benchmark.prototype.start=function(){this.start=(new Date).getTime(),console.time("Benchmark")},Benchmark.prototype.stop=function(){this.stop=(new Date).getTime(),console.timeEnd("Benchmark")},Benchmark.prototype.read=function(){this.data=localStorage.getItem("benchy"),this.data=this.data?JSON.parse(this.data):[]},Benchmark.prototype.write=function(){this.read(),this.data.push(this.stop-this.start),localStorage.setItem("benchy",JSON.stringify(this.data))},Benchmark.prototype.stats=function(){this.read(),console.log(typeof this.data);var t=this.data.reduce(function(t,e,a,o){return a===o.length-1?(t+e)/o.length:t+e},0);console.log("avg: "+t+"ms"),console.log(this.data)},Benchmark.prototype.reset=function(){localStorage.setItem("benchy","[]")},Benchmark.prototype.repeat=function(t){this.read(),this.data.length<t?window.location.reload():this.reset()},window.benchy=new Benchmark;