Added a zone-based optimization.

code/__HELPERS/_extools_api.dm

@@ -10,8 +10,13 @@
 GLOBAL_LIST_EMPTY(auxtools_initialized)
 
 #define AUXTOOLS_CHECK(LIB)\
-	if (!GLOB.auxtools_initialized[LIB] && fexists(LIB) && findtext(call(LIB,"auxtools_init")(),"SUCCESS"))\
-		GLOB.auxtools_initialized[LIB] = TRUE;\
+	if (!GLOB.auxtools_initialized[LIB] && fexists(LIB)) {\
+		var/status = call(LIB,"auxtools_init")();\
+		if(findtext(status,"SUCCESS")) {\
+			GLOB.auxtools_initialized[LIB] = TRUE;}\
+		else {\
+			auxtools_stack_trace("Auxtools failed with status [status]");};\
+};
 
 #define AUXTOOLS_SHUTDOWN(LIB)\
 	if (GLOB.auxtools_initialized[LIB] && fexists(LIB))\

code/controllers/subsystem/adjacent_air.dm

@@ -4,6 +4,7 @@ SUBSYSTEM_DEF(adjacent_air)
 	runlevels = RUNLEVEL_GAME | RUNLEVEL_POSTGAME
 	wait = 10
 	priority = FIRE_PRIORITY_ATMOS_ADJACENCY
+	init_order = INIT_ORDER_AIR_TURFS
 	var/list/queue = list()
 
 /datum/controller/subsystem/adjacent_air/stat_entry(msg)
@@ -17,8 +18,11 @@ SUBSYSTEM_DEF(adjacent_air)
 /datum/controller/subsystem/adjacent_air/Initialize()
 	while(length(queue))
 		fire(mc_check = FALSE)
+	build_zones()
 	return ..()
 
+/datum/controller/subsystem/adjacent_air/proc/build_zones()
+
 /datum/controller/subsystem/adjacent_air/fire(resumed = FALSE, mc_check = TRUE)
 
 	var/list/queue = src.queue

code/controllers/subsystem/air.dm

@@ -153,15 +153,6 @@ SUBSYSTEM_DEF(air)
 		if(state != SS_RUNNING)
 			return
 		resumed = 0
-		currentpart = SSAIR_EXCITEDGROUPS
-	// Making small pressure deltas equalize immediately so they don't process anymore
-	if(currentpart == SSAIR_EXCITEDGROUPS)
-		timer = TICK_USAGE_REAL
-		process_excited_groups(resumed)
-		cost_groups = MC_AVERAGE(cost_groups, TICK_DELTA_TO_MS(TICK_USAGE_REAL - timer))
-		if(state != SS_RUNNING)
-			return
-		resumed = 0
 		currentpart = SSAIR_TURF_POST_PROCESS
 	// Quick multithreaded "should we display/react?" checks followed by finishing those up before the next step
 	if(currentpart == SSAIR_TURF_POST_PROCESS)
@@ -315,10 +306,6 @@ SUBSYSTEM_DEF(air)
 			return
 	*/
 
-/datum/controller/subsystem/air/proc/process_excited_groups(resumed = 0)
-	if(process_excited_groups_auxtools(resumed,MC_TICK_REMAINING_MS))
-		pause()
-
 /datum/controller/subsystem/air/proc/finish_turf_processing(resumed = 0)
 	if(finish_turf_processing_auxtools(MC_TICK_REMAINING_MS))
 		pause()
@@ -331,7 +318,6 @@ SUBSYSTEM_DEF(air)
 /datum/controller/subsystem/air/proc/process_turfs_auxtools()
 /datum/controller/subsystem/air/proc/post_process_turfs_auxtools()
 /datum/controller/subsystem/air/proc/process_turf_equalize_auxtools()
-/datum/controller/subsystem/air/proc/process_excited_groups_auxtools()
 /datum/controller/subsystem/air/proc/get_amt_gas_mixes()
 /datum/controller/subsystem/air/proc/get_max_gas_mixes()
 /datum/controller/subsystem/air/proc/turf_process_time()

code/game/atoms.dm

@@ -368,7 +368,6 @@
 	return FALSE
 
 /atom/proc/assume_air(datum/gas_mixture/giver)
-	qdel(giver)
 	return null
 
 /atom/proc/remove_air(amount)

code/modules/atmospherics/environmental/LINDA_turf_tile.dm

@@ -49,13 +49,11 @@
 	if(!giver)
 		return FALSE
 	air.merge(giver)
-	update_visuals()
 	return TRUE
 
 /turf/open/remove_air(amount)
 	var/datum/gas_mixture/ours = return_air()
 	var/datum/gas_mixture/removed = ours.remove(amount)
-	update_visuals()
 	return removed
 
 /turf/open/proc/copy_air_with_tile(turf/open/T)