[MIRROR] Micro optimizations: Now much less exhaustive [MDB IGNORE] (#9541)

* Micro optimizations: Now much less exhaustive (#62844)

* Micro optimizations: Now much less exhaustive

Co-authored-by: Jeremiah <42397676+jlsnow301@users.noreply.github.com>

code/__HELPERS/_lists.dm

@@ -169,8 +169,7 @@
 /proc/typecache_filter_list(list/atoms, list/typecache)
 	RETURN_TYPE(/list)
 	. = list()
-	for(var/thing in atoms)
-		var/atom/atom_checked = thing
+	for(var/atom/atom_checked as anything in atoms)
 		if (typecache[atom_checked.type])
 			. += atom_checked
 
@@ -178,16 +177,16 @@
 /proc/typecache_filter_list_reverse(list/atoms, list/typecache)
 	RETURN_TYPE(/list)
 	. = list()
-	for(var/atom/atom as anything in atoms)
-		if(!typecache[atom.type])
-			. += atom
+	for(var/atom/atom_checked as anything in atoms)
+		if(!typecache[atom_checked.type])
+			. += atom_checked
 
 ///similar to typecache_filter_list and typecache_filter_list_reverse but it supports an inclusion list and and exclusion list
 /proc/typecache_filter_multi_list_exclusion(list/atoms, list/typecache_include, list/typecache_exclude)
 	. = list()
-	for(var/atom/atom as anything in atoms)
-		if(typecache_include[atom.type] && !typecache_exclude[atom.type])
-			. += atom
+	for(var/atom/atom_checked as anything in atoms)
+		if(typecache_include[atom_checked.type] && !typecache_exclude[atom_checked.type])
+			. += atom_checked
 
 ///Like typesof() or subtypesof(), but returns a typecache instead of a list
 /proc/typecacheof(path, ignore_root_path, only_root_path = FALSE)

code/__HELPERS/game.dm

@@ -352,10 +352,9 @@
 ///wrapper for flick_overlay(), flicks to everyone who can see the target atom
 /proc/flick_overlay_view(image/image_to_show, atom/target, duration)
 	var/list/viewing = list()
-	for(var/viewer in viewers(target))
-		var/mob/viewer_mob = viewer
-		if(viewer_mob.client)
-			viewing += viewer_mob.client
+	for(var/mob/viewer as anything in viewers(target))
+		if(viewer.client)
+			viewing += viewer.client
 	flick_overlay(image_to_show, viewing, duration)
 
 ///Get active players who are playing in the round
@@ -584,7 +583,7 @@
 /proc/find_obstruction_free_location(range, atom/center, area/specific_area)
 	var/list/possible_loc = list()
 
-	for(var/turf/found_turf in RANGE_TURFS(range, center))
+	for(var/turf/found_turf as anything in RANGE_TURFS(range, center))
 		// We check if both the turf is a floor, and that it's actually in the area.
 		// We also want a location that's clear of any obstructions.
 		if (specific_area && !istype(get_area(found_turf), specific_area))