Respawn mechanics are independent of match time.
Match time is simply how long you --- the developer --- want the game will last. I can put a buzzer in every game that will last only 10 minutes for example. Doesn't matter what mode, what you are doing at the end of the 10 minutes, whether the objectives are accomplished or not, the game just ends, like a school recess buzzer or the bell in the round of a boxing match. At the end of 10 minutes, the game simply stops, all totals are calculated and the computer chooses a winner.
Lets say, no matter how many respawns are in the game, every War Thunder arcade mode game lasts for 20 minutes. Every single freaking time. And often less. But never never more than 20 minutes. Guess why? Because there is a buzzer that forces ends each game when 20 minutes is reached. Its called a Time Limit.
Edited by Anjian, 19 April 2017 - 08:34 AM.