-- LocalScript: FPS + Ping Monitor
-- Place in StarterPlayerScripts

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

-- Create simple UI
local screenGui = Instance.new("ScreenGui")
screenGui.Name = "PerfMonitor"
screenGui.ResetOnSpawn = false
screenGui.Parent = LocalPlayer:WaitForChild("PlayerGui")

local frame = Instance.new("Frame")
frame.Size = UDim2.new(0, 200, 0, 80)
frame.Position = UDim2.new(0, 10, 0, 10)
frame.BackgroundTransparency = 0.4
frame.Parent = screenGui

local fpsLabel = Instance.new("TextLabel")
fpsLabel.Size = UDim2.new(1, -10, 0, 30)
fpsLabel.Position = UDim2.new(0, 5, 0, 5)
fpsLabel.BackgroundTransparency = 1
fpsLabel.TextScaled = true
fpsLabel.Font = Enum.Font.SourceSansBold
fpsLabel.Text = "FPS: ..."
fpsLabel.Parent = frame

local pingLabel = fpsLabel:Clone()
pingLabel.Position = UDim2.new(0, 5, 0, 40)
pingLabel.Text = "Ping: ..."
pingLabel.Parent = frame

-- FPS calculation
local lastTime = tick()
local frames = 0
local fps = 0

RunService.RenderStepped:Connect(function()
    frames = frames + 1
    local now = tick()
    if now - lastTime >= 1 then
        fps = math.floor(frames / (now - lastTime) + 0.5)
        frames = 0
        lastTime = now
        fpsLabel.Text = "FPS: " .. tostring(fps)
        -- color-coding
        if fps >= 50 then
            fpsLabel.TextColor3 = Color3.fromRGB(0, 200, 0)
        elseif fps >= 30 then
            fpsLabel.TextColor3 = Color3.fromRGB(255, 165, 0)
        else
            fpsLabel.TextColor3 = Color3.fromRGB(255, 0, 0)
        end
    end
end)

-- Ping / Round-trip time
local function updatePing()
    local matchStats = LocalPlayer:GetNetworkPing() -- Roblox 2024+ has GetNetworkPing; fallback below if nil
    if matchStats then
        pingLabel.Text = "Ping: " .. tostring(math.floor(matchStats * 1000)) .. " ms"
    else
        -- Fallback: use os.clock measurement (approx)
        local start = tick()
        game:GetService("ReplicatedStorage"):GetPropertyChangedSignal("Changed"):Wait() -- harmless wait to yield
        local elapsed = tick() - start
        pingLabel.Text = "Ping: " .. tostring(math.floor(elapsed * 1000)) .. " ms"
    end
end

-- update ping every 2 seconds
while true do
    pcall(updatePing)
    wait(2)
end