[MIRROR] Startup Time Optimization (#10940)

Co-authored-by: ShadowLarkens <shadowlarkens@gmail.com>
Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/ZAS/Atom.dm

@@ -56,6 +56,28 @@
 	#endif
 	return (AIR_BLOCKED*!CanZASPass(other, FALSE))|(ZONE_BLOCKED*!CanZASPass(other, TRUE))
 
+/turf/proc/self_airblock()
+	if(blocks_air & AIR_BLOCKED)
+		return BLOCKED
+
+	if(blocks_air & ZONE_BLOCKED)
+		return ZONE_BLOCKED
+
+	var/result = 0
+	for(var/atom/movable/M as anything in contents)
+		switch(M.can_atmos_pass)
+			if(ATMOS_PASS_YES)
+				continue
+			if(ATMOS_PASS_NO)
+				return BLOCKED
+			if(ATMOS_PASS_DENSITY)
+				if(M.density)
+					return BLOCKED
+			if(ATMOS_PASS_PROC)
+				result |= M.c_airblock(src)
+		if(result == BLOCKED) return BLOCKED
+	return result
+
 /turf/c_airblock(turf/other)
 	#ifdef ZASDBG
 	ASSERT(isturf(other))

code/ZAS/Diagnostic.dm

@@ -55,7 +55,7 @@
 		return
 
 	if(direction == "N/A")
-		if(!(T.c_airblock(T) & AIR_BLOCKED))
+		if(!(T.self_airblock() & AIR_BLOCKED))
 			to_chat(mob, "The turf can pass air! :D")
 		else
 			to_chat(mob, "No air passage :x")

code/ZAS/Turf.dm

@@ -11,7 +11,7 @@
 		vis_contents -= graphic_remove
 
 /turf/proc/update_air_properties()
-	var/block = c_airblock(src)
+	var/block = self_airblock()
 	if(block & AIR_BLOCKED)
 		//dbg(blocked)
 		return 1
@@ -139,8 +139,7 @@
 		c_copy_air()
 		zone = null //Easier than iterating through the list at the zone.
 
-	var/s_block // CHOMPEdit
-	ATMOS_CANPASS_TURF(s_block, src, src)
+	var/s_block = self_airblock()
 	if(s_block & AIR_BLOCKED)
 		#ifdef ZASDBG
 		if(verbose) to_world("Self-blocked.")