Userscripts.org

Great script, very useful.

One thing I would change: instead of giving you the difference in ms, how about as a multiple?

eg. if

F1: 200ms
F2: 100ms

Instead of

"F2 is 100ms faster than F1"

how about

"F2 is 2.0 times faster than F1"

Well, the reason I suggest this is that whether you run it with 1m loops or 50m loops, the multiple/ratio between the two functions [should] stay (about) the same, providing the true relationship between the two functions. Yet the actual difference in ms between them will vary wildly (say, by *50).

If anybody wants to implement this themselves, just change the end to something like:

if(time_measure_1 < time_measure_2)
  alert("F1 is " + (time_measure_2 / time_measure_1).toFixed(2) + "x faster than F2");
else
  alert("F2 is " + (time_measure_1 / time_measure_2).toFixed(2) + "x faster than F1");