Jorijn ran the same block twice, split five held and five released, and the held
half kept costing about 2.7 seconds more per press in the client while the
daemon's own decide time stayed at 36 to 334 milliseconds either way. The gap was
not the sensor and not the matcher. It was this daemon.
The save was deferred until after the verdict was posted, for exactly the right
reason. The harvest was not, and the harvest is up to eight capture-and-fold
round trips. Holding a finger through the verdict keeps it fed to its frame
limit, so a held press folded eight frames and a released press folded one --
and every one of those folds sat between the match and the client hearing about
it.
Both now run after the event is posted. A finger held through the verdict is
still there a millisecond later, so the harvest loses nothing by waiting, and
the frame that actually matters was already folded at the moment it matched.