use System.Diagnostics


class X

	def main
		v = false
		count = 1_000_000
		key = 'k'

		d = Dictionary<of String, bool>()
		for c in 'abcdefghijklmnopqrstuvwxyz'
			d[c.toString] = false
		
		sw = Stopwatch()
		sw.start
		for i in count
			b = d.containsKey(key)
			b = d.containsKey(key)
			b = d.containsKey(key)
			b = d.containsKey(key)
			b = d.containsKey(key)
		sw.stop
		t1 = sw.elapsedMilliseconds
		if v, print 'containsKey:', t1

		sw.reset
		sw.start

		for i in count
			b = key in d.keys
			b = key in d.keys
			b = key in d.keys
			b = key in d.keys
			b = key in d.keys
		sw.stop
		t2 = sw.elapsedMilliseconds
		if v, print 'key in d.keys:', t2

		factor = t2 / t1
		if v, print '[factor] X slower'

		assert factor < 2.0   # used to be around 14 - 15 when "key in d.keys" was a linear search
				
		CobraCore.noOp(b)