W.I.P untitled drift game lag reduction

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

local LOCAL_PLAYER = Players.LocalPlayer
local LOCAL_CAR_NAME = LOCAL_PLAYER.Name .. "sCar"

local HIDE_DISTANCE = 100
local UPDATE_RATE = 0.25 -- seconds

type CarData = {
	Model: Model,
	Parts: {BasePart},
	Hidden: boolean,
}

local trackedCars: {[Model]: CarData} = {}

local function getRoot(model: Model): BasePart?
	return model.PrimaryPart
		or model:FindFirstChild("HumanoidRootPart", true)
		or model:FindFirstChildWhichIsA("BasePart", true)
end

local function collectRenderableParts(container: Instance, output: {BasePart})
	for _, obj in ipairs(container:GetDescendants()) do
		if obj:IsA("BasePart") then
			table.insert(output, obj)
		end
	end
end

local function scanCar(car: Model)
	if trackedCars[car] then
		return
	end

	if car.Name == LOCAL_CAR_NAME then
		return
	end

	if not car.Name:match("sCar$") then
		return
	end

	local renderParts = {}

	local targetContainers = {
	"Paint",
	"Misc",
	"shirtstuckedin",
	"c55ag9i",
	"jokus13ag9i",
	"3037ag9i",
	"s14icy",
	"jzx81ag9i",
	"jee46",
	"Model",
	"fd3s",
	"c33",
	"joo o",
}

for _, name in ipairs(targetContainers) do
	local container = car:FindFirstChild(name, true)
	if container then
		collectRenderableParts(container, renderParts)
	end
end

	trackedCars[car] = {
		Model = car,
		Parts = renderParts,
		Hidden = false,
	}
end

local function removeCar(car: Model)
	trackedCars[car] = nil
end

local function hideCar(data: CarData)
	if data.Hidden then
		return
	end

	data.Hidden = true

	for _, part in ipairs(data.Parts) do
		if part.Parent then
			part.LocalTransparencyModifier = 1
		end
	end
end

local function showCar(data: CarData)
	if not data.Hidden then
		return
	end

	data.Hidden = false

	for _, part in ipairs(data.Parts) do
		if part.Parent then
			part.LocalTransparencyModifier = 0
		end
	end
end

for _, obj in ipairs(workspace:GetDescendants()) do
	if obj:IsA("Model") then
		scanCar(obj)
	end
end

workspace.DescendantAdded:Connect(function(obj)
	if obj:IsA("Model") then
		scanCar(obj)
	end
end)

workspace.DescendantRemoving:Connect(function(obj)
	if obj:IsA("Model") then
		removeCar(obj)
	end
end)

local accumulator = 0

RunService.Heartbeat:Connect(function(dt)
	accumulator += dt

	if accumulator < UPDATE_RATE then
		return
	end

	accumulator = 0

	local character = LOCAL_PLAYER.Character
	if not character then
		return
	end

	local hrp = character:FindFirstChild("HumanoidRootPart")
	if not hrp then
		return
	end

	local playerPos = hrp.Position

	for model, data in pairs(trackedCars) do
		if not model.Parent then
			trackedCars[model] = nil
			continue
		end

		local root = getRoot(model)
		if not root then
			continue
		end

		local dist = (root.Position - playerPos).Magnitude

		if dist >= HIDE_DISTANCE then
			hideCar(data)
		else
			showCar(data)
		end
	end
end)