bench.html

<script>
	var i = 100000
	var r = []
	var a = document.createElement('a')
	while (i--) {
		var s = performance.now()
		a.href = 'https://www.google.com?q=asdf'
		var h = a.hostname
		var e = performance.now()
		r.unshift(e - s)
	}
	var avg = r.reduce(function(p, c) {
		return (p + c) / r.length
	})
	document.write("<div>"+avg+"</div>")
</script>
	
<script>
	var i = 100000
	var r = []
	var a = /^(?:\w+\:\/\/)?([^\/]+)(.*)$/
	while (i--) {
		var s = performance.now()
		var x = a.exec('https://www.google.com?q=asdf')
		var h = x[1]
		var e = performance.now()
		r.unshift(e - s)
	}
	var avg = r.reduce(function(p, c) {
		return (p + c) / r.length
	})
	document.write("<div>"+avg+"</div>")
</script>