How to Use the Spacebar Counter
Pick a duration, then start hitting the space bar. The timer begins on your first press rather than on a countdown, so nothing is wasted while you get your hand in position. The counter, the live presses-per-second rate and the clock all update as you go, and the run ends by itself when the timer hits zero.
Two things make this different from a stopwatch and a tally. First, it counts only Space — every other key is ignored, so a stray Shift or a mistyped letter cannot inflate your number. Second, it discards auto-repeat. If you hold the bar down, the operating system fires a stream of keydown events at roughly 30 per second, and a naive counter treats every one as a press. That is how people end up with impossible scores. Holding the bar here adds nothing to your total, because the counter checks the repeat flag on each event and skips it.
The fastest gap readout is the shortest interval between two consecutive presses in the run. It is worth watching for two reasons. A very fast gap tells you your hardware and your hand are keeping up. A gap under about 25 milliseconds, though, is faster than a human can deliberately double-tap — that is almost certainly switch bounce, where one physical press registers twice. The counter flags those separately so an inflated score does not look like a personal best.
For competitive counting, the 10-second run is the common standard and the 60-second run is the endurance benchmark. Free mode has no timer at all and is the one to use if you are diagnosing rather than competing — press slowly and deliberately, and check that every press you make registers exactly once.
If the count comes out lower than the number of presses you made, the spacebar is dropping inputs and the full keyboard test will show whether other keys do the same. If it comes out higher, run the double typing test — it measures chatter directly and gives you the millisecond gaps. For finger speed on the rest of the keyboard, the clicks per second test and the typing test are the better measures.