[one-zero]

As others posted, training is the key. In a previous organization I served in we pushed the envelope on operating at max speed using CQC as the training vehicle. We had coaches from the USOC in Colorado instruct us on techniques to squeeze performance another tenth of a percent the same fashion elite athletes do since a fraction of a second can make all the difference...
Some of this training is generic, but in our business you have to train specifically to avoid T-vision and "see fast".
I equate it to the difference of a first jump where all the parachutist remembers is a flurry of activity, then has an open chute and relief - to the experienced jumper who is bored during the 4 second sequence as he feels each retaining band release static-line and waits for the parachute to leave the container, etc...his tunnel vision is gone and he sees fast in this skill set.
We encounter this alot with room clearing. Newbies experience aflurry of activity and have a hard time recalling the actions which just occured, while experienced operators are aware of how many rounds they put into each body and are evaluating the next situation to deal with...what gives some an adrenalin rush will seem like slow motion to the trained operator.
There are many drills to help you overall - just like basic PT does for conditioning. But to be top notch you will need to craft the training to the activity you are concerned with - one size does not fit all.