Death wall that kills you is to laggy? Help.

So I got a game where there is an arena and people fight in it. Then I got an Event which triggers that 4 walls spawn and they shrink so all players are forced to move in the middle of the arena. Everything works fine etc BUT If I want to add a deathscript to the walls so they acutally kill you if you touch it, the performance will completly go down. I think its because it is checking everything it touches something to see if it is a hum or not.

Any Idea how to handle this performance wise and only kill the player?

function KillPlayer(part)
	h = part.Parent:findFirstChild("Humanoid")
	if h ~= nil then
		h.Health = 0
	end
end

script.Parent.Touched:connect(KillPlayer)

You probably need to use a debounce.

If you don't know what a debounce is here's a basic explanation:

local debounce = true

function touched()
	if debounce == true then
		debounce = false
		print("I have been touched!")
		wait() -- How many seconds until it can be touched again
		debounce = true 
	end
end

script.Parent.Touched:connect(touched)

So if you wanted to apply this to your script then you would write something like this:

local debounce = true

function KillPlayer(part)
	if debounce == true then
		debounce = false
	    h = part.Parent:findFirstChild("Humanoid")
	    if h ~= nil then
	        h.Health = 0
	    end
		wait()
		debounce = true
	end
end

script.Parent.Touched:connect(KillPlayer)

I hoped this helped you!