There’s a term called ‘Phil Woods Fingers’. It means keeping your fingers as close to the keys as possible when playing. A lot of players, myself included, have a tendency to raise our fingers away from the keys, thus slowing the response. So we all strive to have Phil Woods Fingers.
Same principle, economy of motion, works on any instrument. It takes a bit of time to develop the fingers to mover that way, but man, is it ever worth the time.