What are the specs of your test platform? I just installed locally Windows 10 64bit, 8GB, i7, 2.6GZ, node v8.1.3. Very different results. It also seems I can't create an Issue in your github respository. Do you have Issues turned off?: Single param top 4: moize │ 30,522,105 fast-memoize │ 23,692,264 micro-memoize │ 15,164,454 iMemoized │ 9,512,034 (by anywhichway, not in your test suite) Multiple pram: moize | 17,628,577 micro-memoize │ 9,016,574 iMemoized │ 8,114,019 (by anywhichway, not in your test suite) lru-memoize │ 6,269,999 Multiple param (objects - did not add iMemoized to suite) moize │ 18,108,941 micro-memoize │ 10,661,604 lru-memoize │ 6,255,101 memoizee │ 5,797,888 My guess is if you take the time to build in browser tests, the results will be different yet again.