- very minor perf gain by not doing the per-frame update on invisible modules

- nuked the primary offender of garbage generation. there is more to get rid of but finding it is a tedious process

IceBarElement.lua

@@ -1229,6 +1229,9 @@ function IceBarElement.prototype:Update()
 end
 
 function IceBarElement.prototype:MyOnUpdate()
+	if not self:IsVisible() then
+		return
+	end
 	self:SetScale(self.DesiredScale)
 end
 

IceCore.lua

@@ -690,7 +690,9 @@ function IceCore.prototype:HandleUpdates()
 end
 
 function IceCore.prototype:RequestUpdates(frame, func)
-	self.updatees[frame] = func
+	if self.updatees[frame] ~= func then
+		self.updatees[frame] = func
+	end
 
 	local count = 0
 	for k,v in pairs(self.updatees) do

modules/CustomBar.lua

@@ -48,7 +48,9 @@ end
 
 function IceCustomBar.prototype:ConditionalSubscribe()
 	if self:ShouldAlwaysSubscribe() then
-		IceHUD.IceCore:RequestUpdates(self.frame, function() self:UpdateCustomBar() end)
+		if not IceHUD.IceCore:IsUpdateSubscribed(self.frame) then
+			IceHUD.IceCore:RequestUpdates(self.frame, function() self:UpdateCustomBar() end)
+		end
 	else
 		IceHUD.IceCore:RequestUpdates(self.frame, nil)
 	end

modules/CustomCDBar.lua

@@ -436,7 +436,9 @@ function IceCustomCDBar.prototype:EnableUpdates(enable_update)
 	end
 
 	if enable_update then
-		IceHUD.IceCore:RequestUpdates(self.frame, function() self:UpdateCustomBar(true) end)
+		if not IceHUD.IceCore:IsUpdateSubscribed(self.frame) then
+			IceHUD.IceCore:RequestUpdates(self.frame, function() self:UpdateCustomBar(true) end)
+		end
 	else
 		IceHUD.IceCore:RequestUpdates(self.frame, nil)
 	end