class Benchmark {

	start() {
		this.tstart = process.hrtime();
		return this;
	}
	mark() {
		this.diff = process.hrtime(this.tstart);
		this.tstart = process.hrtime();
		
		return this;
	}
	toString() {
		var msdiff = ( this.diff[0] * 1000000 + this.diff[1] / 1000 ) /1000;
		if(msdiff > 1000) 
			return  (msdiff / 1000).toFixed(2) + "s";
		else {
			return msdiff.toFixed(2) +"ms";
		}
		return "NaN";
	}
}


module.exports = Benchmark;