[MIRROR] Removes 200mb of wasted memory usage (#3472)

* Merge pull request #31835 from MrStonedOne/coiax-is-fired---again

Removes 200mb of wasted memory usage

* Removes 200mb of wasted memory usage

code/__HELPERS/_lists.dm

@@ -485,6 +485,7 @@
 
 //Picks from the list, with some safeties, and returns the "default" arg if it fails
 #define DEFAULTPICK(L, default) ((islist(L) && length(L)) ? pick(L) : default)
+
 #define LAZYINITLIST(L) if (!L) L = list()
 #define UNSETEMPTY(L) if (L && !L.len) L = null
 #define LAZYREMOVE(L, I) if(L) { L -= I; if(!L.len) { L = null; } }

code/_globalvars/lists/typecache.dm

@@ -4,6 +4,8 @@
 //Note: typecache can only replace istype if you know for sure the thing is at least a datum.
 
 GLOBAL_LIST_INIT(typecache_mob, typecacheof(list(/mob)))
+
+GLOBAL_LIST_INIT(typecache_living, typecacheof(list(/mob/living)))
+
 GLOBAL_LIST_INIT(typecache_machine_or_structure, typecacheof(list(/obj/machinery))|typecacheof(list(/obj/structure)))
 
-

code/game/machinery/_machinery.dm

@@ -117,7 +117,7 @@ Class Procs:
 	var/panel_open = FALSE
 	var/state_open = FALSE
 	var/critical_machine = FALSE //If this machine is critical to station operation and should have the area be excempted from power failures.
-	var/list/occupant_typecache = list(/mob/living) // turned into typecache in Initialize
+	var/list/occupant_typecache //if set, turned into typecache in Initialize, other wise, defaults to mob/living typecache
 	var/atom/movable/occupant = null
 	var/unsecuring_tool = /obj/item/wrench
 	var/interact_open = FALSE // Can the machine be interacted with when in maint/when the panel is open.
@@ -141,7 +141,8 @@ Class Procs:
 		START_PROCESSING(SSfastprocess, src)
 	power_change()
 
-	occupant_typecache = typecacheof(occupant_typecache)
+	if (occupant_typecache)
+		occupant_typecache = typecacheof(occupant_typecache)
 
 /obj/machinery/Destroy()
 	GLOB.machines.Remove(src)
@@ -189,7 +190,7 @@ Class Procs:
 	density = TRUE
 	if(!target)
 		for(var/am in loc)
-			if(!is_type_in_typecache(am, occupant_typecache))
+			if(!is_type_in_typecache(am, (occupant_typecache || GLOB.typecache_living)))
 				continue
 			var/atom/movable/AM = am
 			if(AM.has_buckled_mobs())