Aux no longer consumes resources when not in use

Aux would perform unnecessary tasks every frame even when not in use. This has been solved by only running those tasks when Aux is actually doing things.

control.lua

@@ -2,7 +2,7 @@ module 'aux'
 
 local T = require 'T'
 
-local event_frame = CreateFrame'Frame'
+local event_frame = CreateFrame('Frame', 'AuxThreadingFrame')
 
 local listeners, threads = T.acquire(), T.acquire()
 
@@ -10,7 +10,6 @@ local thread_id
 function M.thread_id() return thread_id end
 
 function handle.LOAD()
-	event_frame:SetScript('OnUpdate', UPDATE)
 	event_frame:SetScript('OnEvent', EVENT)
 end
 
@@ -39,6 +38,11 @@ do
 		for id, thread in threads do
 			if thread.killed or not thread.k then
 				threads[id] = nil
+				local hasLiveThread = false
+				for _ in pairs(threads) do hasLiveThread = true break end
+				if not hasLiveThread then -- Disable threading task so it doesn't consume resources doing nothing
+					event_frame:SetScript('OnUpdate', nil)
+				end
 			else
 				local k = thread.k
 				thread.k = nil
@@ -100,6 +104,9 @@ do
 		arg.f = tremove(arg, 1)
 		local thread_id = unique_id()
 		threads[thread_id] = T.map('k', setmetatable(arg, mt))
+		if event_frame:GetScript("OnUpdate") == nil then -- Spin up threading if it was turned off
+			event_frame:SetScript('OnUpdate', UPDATE)
+		end
 		return thread_id
 	end