I will often take some time with holding my backswing. Why? Because I don't use a bought meter or one taped to my monitor. So when using my 25 foot meter on a 14 foot putt I'll pull back to halfway and say "That's 12.5 feet" Then I'll go to 3/4 pull back and tell myself "That's about 19, so halfway between them will be 3 feet, back off just a tad more to get closer to 15, and then a tad more for the green speed. Oops, that was a bit too much, now add just a little back....okay, that looks good. Swing!"
Why not just use the 15 foot meter with a little off or let roll a foot past if miss? because the 25 foot meter will travel less meter distance and actually be a bit slower to hit my ding. I know some have said "The meter speeds up as it gets closer to the ding bar," and it does. The further you pull back, the faster it will be moving when gets to the ding bar. So if you take the time to figure with a higher distance meter you can slow the meter just a bit.
I do this with almost every putt and wedge shot to green to some degree. If there is a drop or rise to the hole I'll have already calculated in the shot distance I need. I'll also have looked to see if that "0" hole has blue or red squared touching it and even do a loop around the hole to see if any nearby changes on the ones that say there is a rise or drop. On one hole it was 1" down, but I checked and found that halfway to hole it was 2" down, so I knew I had a 2" dip then a 1" climb
Even with all this, my total time looking at a shot is rarely over 45 seconds for even the most complicated putt, but also rarely under 15 seconds for anything more than 5 feet from the hole and I've only been playing for about 3 weeks. One thing I have started doing is ignoring the medium to slow moving dots on putts under 3 foot and using force to make it go straight...to mixed results. I've rimmed a few, actually dipped into and out the other side of one and couple times missed the hole completly and had sail past a couple yards. But most of the time it has worked, especially if I hit the ding, and my shot is over in 5 seconds from start of timer.