This should hopefully reduce processing requirements, by not rebuilding icons every tick.

(Ported oldcode, all props to Strumpetplaya)

code/modules/mob/living/carbon/human/life.dm

@@ -85,7 +85,7 @@
 	handle_health_updates()
 
 	// Update clothing
-	update_clothing()
+//	update_clothing()
 
 	if(client)
 		handle_regular_hud_updates()

code/modules/mob/screen.dm

@@ -474,6 +474,7 @@
 						usr << "\blue You successfully remove your handcuffs."
 						usr:handcuffed:loc = usr:loc
 						usr:handcuffed = null
+						usr.update_clothing()
 
 			if(istype(usr, /mob/living/carbon/human) && istype(usr:wear_suit, /obj/item/clothing/suit/straight_jacket) && usr:canmove && (usr.last_special <= world.time))
 				usr.next_move = world.time + 200