Baystation12/Baystation12 — pull request #4456 by Loganbacca (2014-02-18 04:13:43+00:00)
Title: Code effeciency project: vent pump processing

- Tweaked the pressure delta check to "> 0.5", so pumps will stop transferring minor volumes of air every tick (because a delta of 3.05176e-005 is still greater than 0). This also reduces the calls to gas_mixture/merge() and gas_mixture/remove() significantly once the air in the environment has equalized.

A 30 second sample after running the game for 10 minutes:
```
Proc Name	Self CPU	Total CPU	Real Time	Calls
/obj/machinery/atmospherics/unary/vent_pump/process	0.035	0.141	0.141	3808	<- before
/obj/machinery/atmospherics/unary/vent_pump/process	0.014	0.042	0.043	3808	<- after
```