Formula

S = (Tw - Tl) - (Rw - Rl) - (Cw - Cl)

Tw = Wins by Timeout

Tl = Losses by Timeout

Rw = Wins by Resignation

Rl = Losses by Resignation

Cw = Wins by Checkmate

Cl = Losses by Checkmate

If S > 10, you are playing too fast

If -10 < S < 10, you are using your time right

If S < -10, you are playing too slow

S = (23.1 - 5.9) - (46.2 - 64.7) - (30.8 - 29.4)

S = 34.3

S > 10, you are playing too fast.

true 

You didn't do the draws 

D3 - draw by 3 fold                                                                                                                            D50 - draw by 50 moves                                                                                                                    Da - draw by  agreement                                                                                                              DLm - draw by lack of  mating material due to time                                                                          Ds  draw by stalemate

yeah

S = (Tw - Rw - Cw) x (1) + (Any draws situation that you can think) x (0) + (Tl - Rl - Cl) x (-1)

S = S = (Tw - Tl) - (Rw - Rl) - (Cw - Cl)