def perform_something(&block)
	start = Time.monotonic
	yield
	Time.monotonic - start
end

def perform_benchmark_average(ntimes : Int32, &block)
	i = 1
	sum = Time::Span.zero
	while i <= ntimes
		elapsed_time = perform_something &block
		sum += elapsed_time
		i += 1
	end

	sum / ntimes
end