msreflex Privacy
A click time stays on this page. Refresh and it is gone. It is not sent to msreflex and it is not saved on a server.
What this site touches
There is no account and no result URL. The millisecond number lives in the browser until you refresh or start another run.
This deploy does not load Google Analytics, and msreflex does not set a cookie of its own. If a measurement ID is added later, gtag would send a page view only. The click time would still not be part of that hit.