.Touched + GetServerTimeNow question

Help and Feedback Scripting Support
#1

I have a question regarding the .Touched function. When creating two scripts, one LocalScript and one Script, with the following code:

local ClockStart = nil
local Debounce = false

if game:GetService("RunService"):IsServer() then
	ClockStart = workspace:GetServerTimeNow()
	workspace:SetAttribute("ClockStart", ClockStart)
else
	ClockStart = workspace:GetAttribute("ClockStart")
end

workspace:WaitForChild("Brick").Touched:Connect(function()
	local TouchTime = workspace:GetServerTimeNow() - ClockStart

	if not Debounce then
		Debounce = true

		print(TouchTime)
		--> Client: 12.842 
		--> Server: 11.985

		task.wait(1)
		Debounce = false
	end
end)

When printing from both scripts, there is often a small difference. I assume it’s just regular client-server latency; however, as you can see above, sometimes the server returns a lower time than what the client returns.

Does anyone know why this happens? And what would be a better alternative to accurately and precisely determine the touch time as shown above?

#2

Use spatial querys, it’s way better than touched event.

#3

In what way? Isn’t the use of spatial queries a lot more expensive?

#4

kinda but it has a better reaction and detects collisions even when not moving.

#5

my use case for this is to track as accurately as possible fast-moving objects passing through stationary checkpoints. i am not sure if using spatial queries in this case will be more precise but i do know it will be quite expensive (unless you provide a proper example i do not think this is a valid solution)