How much performance does a running terminal use?

I'm just wondering how much cpu performance a simple while loop or a running terminal in general will take,
and if it will affect the general MC performance if i have some cc terminals running something like this:

timer = os.startTimer(2)
while true do
counter=counter+1
  evt, p1, p2 = os.pullEvent()
	if evt == "redstone" then
	  if rs.testBundledInput("left",1) == true then
		mapi.writePos(sidem,"open",2,3)
		o1()
	  elseif rs.testBundledInput("left",2) == true then
		mapi.writePos(sidem,"close",2,3)
		c1()
	  elseif rs.testBundledInput("left",0) == true then
		mapi.writePos(sidem,"null",2,3)
	  else
		mapi.writePos(sidem,"wtff",2,3)
	  end
	elseif evt == "timer" then
	  if p1 == timer then
		mapi.writePos(sidem,counter,2,2)
		print("timer")
		timer = os.startTimer(2)
	  end
	end
end

Because now i make every program so it will shut the terminal down completely, if that is an option considering its task ofc^^
Would be cool if i could leave them on without having performance issues in the future because of them, when i have more then 3 in my world :)/>/>

I have many mods, and don't realy know which ones are responsible for lagspikes etc.
That's why i asking instead of just testing it for myself, but after getting so many mods to finaly run alongside each other, i don't want to mess with that anymore :)/>/>

I for long time had CC alone (save for forge) and had even up to 80 terminals running at once without lags (except usual ones caused by my crappy computer)

It depends. How many CPU cores do you have?

LUA runs in a seperate thread from minecraft, so as long as you have multiple cores you shouldn't see any lag.

The performance impact would be negligible - the way cc works is that each computer has to yield - meaning unless an event is received, no Lua code is actually running, and the java code only passes control back if an event is received.

D3matt, on 02 June 2012 - 05:58 AM said:

It depends. How many CPU cores do you have?

LUA runs in a seperate thread from minecraft, so as long as you have multiple cores you shouldn't see any lag.

That's good to hear! Shouldn't be a problem then with my 955BE :)/>/>
With optifine HD_B2 minecraft finally runs without this annoying "stuttering"(that i got despite it running with 100+fps oO) too.

Thanks everyone for the answers :D/>/>