class SpeedMeasurer
	def initialize(window = 60)
		@window = 60
		reset
	end

	def reset
		@part1 = [Time.now, 0]
		@part2 = [Time.now, 0]
	end

	def log(processed)
		@part2[1] += processed
		now = Time.now
		if now - @part2[0] > @window
			@part1 = @part2
			@part2 = [now, 0]
		end
	end

	def speed
		return (@part1[1] + @part2[1]) / (Time.now - @part1[0])
	end
end