Faster Clock then "while game.RunService.Heaterbeat:Wait()"

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#1

I am attempting to create a CPU emulation and for my needs 60 clocks per second would not be fast enough, any ways to create a faster loop?

#2

the only thing I could think of is while wait() do but I’m not sure if its faster. If it isn’t I don’t think there is anything faster.

#3

You can try something like this: (tested in Studio)
It basically works by using while true do break end, which should break very quickly and waits around 0.0000001000008, which is then scaled to milliseconds.

local function sleep(t: number)
	t = t * .001
	
	local now = os.clock()
	local delta
	
	if .02 <= t then
		repeat
			delta = task.wait()
		until os.clock() + delta >= now + t
	end
	
	repeat
		while true do break end
	until now + t <= os.clock()
end

t is in milliseconds.

Benchmarks:

image
image207×658 15.4 KB

Benchmarking code:

for _ = 1, 1000, 1 do
	local t = os.clock()
	sleep(10)
	print(os.clock() - t)
end

Another example with task.wait() vs sleep with waiting one second:
image

Benchmarking code:

for _ = 1, 2, 1 do
	local t = os.clock()
	task.wait(1)
	print(os.clock() - t)
end

print(string.rep("-", 50))

for _ = 1, 2, 1 do
	local t = os.clock()
	sleep(1000)
	print(os.clock() - t)
end
2 Likes
#4

Here is my wait function that is down to 100ns accuracy on my pc.

function waitAccurate(ts)
	local t = os.clock()
	while os.clock()-t < ts do
		
	end
end