The 515 MegaPR early downport (#7783)

Co-authored-by: Selis <selis@xynolabs.com>
Co-authored-by: Selis <sirlionfur@hotmail.de>
Co-authored-by: Kashargul <144968721+Kashargul@users.noreply.github.com>
Co-authored-by: SatinIsle <thesatinisle@gmail.com>
Co-authored-by: Heroman <alesha3000@list.ru>
Co-authored-by: Casey <a.roaming.shadow@gmail.com>
Co-authored-by: Raeschen <rycoop29@gmail.com>

code/_helpers/sorts/TimSort.dm

@@ -8,10 +8,14 @@
 		if(toIndex <= 0)
 			toIndex += L.len + 1
 
-		sortInstance.L = L
-		sortInstance.cmp = cmp
-		sortInstance.associative = associative
+		var/datum/sort_instance/SI = GLOB.sortInstance
+		if(!SI)
+			SI = new
 
-		sortInstance.timSort(fromIndex, toIndex)
+		SI.L = L
+		SI.cmp = cmp
+		SI.associative = associative
+
+		SI.timSort(fromIndex, toIndex)
 
 	return L