How butterfly clicking works
Butterfly clicking uses two fingers on the same mouse button, usually the index and middle finger. They take turns, one tapping while the other lifts. Because each finger only has to click half as often, the combined rate can be much higher than one finger alone.
To try it, rest both fingertips on the left button, side by side. Tap them in turn with a light, rolling rhythm, a bit like drumming your fingers on a table. Keep the movements small, since big lifts waste time.
What this test measures
The timer starts with your first click inside the box and runs for 10 seconds. Every left click counts, and the live display shows the time left, your clicks and your live CPS. You finish with your CPS to one decimal, a rating, the total clicks and your personal best, and the 10 second mode keeps its own history in the Your scores panel.
Ten seconds gives the rhythm time to settle. Butterfly clicking often starts messy, with the fingers out of step, and a very short test can catch only that untidy start.
Double click registration
Many mice register some butterfly presses as double clicks. A single press can bounce inside the switch and reach the computer as two clicks. This test counts every click it receives, so double registration can lift your score above what your fingers actually did. If your butterfly score is far higher than you expected, that may be part of the reason.
The same hard use is why fast techniques add wear to switches, and a worn switch is more likely to send unwanted double clicks during everyday use too.
Butterfly clicking and game servers
Because of those extra registered clicks, butterfly clicking is banned on some game servers. Rules differ from one server to the next, so check the rules of any server you play on before you use it there. This test only measures speed. It does not decide whether a technique is allowed anywhere.
Compare your result with the jitter click test, which relies on arm tension instead, or check your mouse with the mouse click test if it has started double clicking on its own. For a PvP style 10 second run, the Kohi click test uses the same timer.