Would you mind if the game ignored resource amounts below 1g?
As for now it does all the calculations down to miligrams and even micrograms. Iirc it tgnores thermal transfer below a certain mass but there`s still mcg debris piles and mcg gas puffs flying around taking pc resources for stuff nobody really cares about. If the game just ignored those small amounts it would both help (at least a bit) with perfomance but also make vacuuming rooms much faster and potentially surface breaches more dangerous.
Or another question: Would you take reduced calculation accuracy for more performance? Like if thermal calculations are done once per 2 seconds instead of 4 times per second (or however often they are currently done). Same for diagnostics and other stuff that won`t break the game if it happens less often (i imagine pathing can`t take that treatment).
A change like this might break certain designs and cause weird bugs but personally i think it`s worth it if it can improve the gameplay.