Countdown and stopwatch have millisecond precision

[4evermaat]

The countdown or count up (stopwatch) you display should at least have millisecond precision (microsecond precision if possible).

so you have DDD:HH:MM:SS.mmm.mic

At least millisecond precision.

DDD:HH:MM:SS.mmm

Microseconds may not be needed, but if you can put it there, might as well.

https://twitter.com/Dziemborowicz/status/674106790481518592

[prat0088]

Why is this needed? You're never going to be able to start or stop the timer with that much accuracy.