task scheduler test

scheduler.lua

-- Run in LocalScript context.
-- Move mouse around to see Input event ordering in the output as well.

local RunService = game:GetService("RunService")
local UserInputService = game:GetService("UserInputService")

local lastT = os.clock()

local function FmtTime(event)
	local t = os.clock()
	local diff = t - lastT
	
	if diff >= 0.01 then -- roughly the time between frames at 60 fps
		print("------------------------")
	end
	
	lastT = t
	
	print(("%.3f"):format(t), ("%.3fms"):format(math.round(diff*1000000)/1000), event)
end

-- Input
UserInputService.InputChanged:Connect(function(input)
	if input.UserInputType == Enum.UserInputType.MouseMovement then
		FmtTime("Input")
	end
end)

-- Hearbeat
RunService.Heartbeat:Connect(function()
	FmtTime("Heartbeat")
end)

-- Stepped
RunService.Stepped:Connect(function()
	FmtTime("Stepped")
end)

-- RenderStepped
RunService.RenderStepped:Connect(function()
	FmtTime("RenderStepped")
end)

-- Wait
while true do
	wait() -- task.wait() resumes every Heartbeat, whereas wait() resumes between RenderStepped and Stepped
	FmtTime("Wait")
end