Inspired by this comment. When photographing water drops, I've made a habit out of limiting as much lag to the process as I can. What this means is, I set up the shot, use mirror lock up to lock the mirror, open the shutter (bulb), tap my water dropper, and then press a remote trigger for the flash.
The question is, is this process worth it? Let's assume that I'm going to just press a remote shutter release and then let the chain of events run its normal course (mirror up, shutter open, flash firing).
How much lag is introduced by the mirror needing to flip and by the shutter needing to travel?