What does a very fast repeat press mean?

If you clicked once and the tool measured two presses a few milliseconds apart, the switch is "bouncing". It is a common fault in older mice.

Is anything recorded or uploaded?

No. The test runs entirely in your browser. Nothing is recorded, stored or sent to a server.

JavaScript is turned off. InspireTools processes files in your browser, so the tools need JavaScript to run.

Check every mouse button, the scroll wheel and double-clicks.