How do I fix a laggy camera?

So I made(am making) a game with a top down styled "scriptable" camera. You use WASD or arrows and it adds velocity in the corresponding direction. The camera is super laggy for some reason.

--Movement Script--

local player = game.Players.LocalPlayer
local mouse = player:GetMouse()
local left = false
local right = false
local up = false
local down = false
local bVel = nil
local angle = game.Workspace.Angle
--[[       0.1 - 0.5 = Heavy Friction;     0.5 - 0.9 Low Friction]]
local friction = .9
ball = nil
game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Health, false)
game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.Backpack, false)
game.StarterGui:SetCoreGuiEnabled(Enum.CoreGuiType.PlayerList, false)




player.CharacterAdded:connect(function()
        wait()
        player.Character.Parent = game.Lighting
        for i,v in pairs(game.Workspace:GetChildren())do
                if v.Name == "Ball" then
                        if v:FindFirstChild('Owner') then
                                if v.Owner.Value == player.Name then
                                        ball = v
                                        bVel = ball.BodyVelocity
                                end
                        end
                end
        end




end)


mouse.KeyDown:connect(function(key)
        --if player.PlayerGui.Playing.Value == true and player.PlayerGui.inGame.Value ~= "" or player.PlayerGui.Playing.Value == false and player.PlayerGui.inGame.Value == "" then
        k = string.byte(key)
        if k == 97 or  k == 20 then
                left = true
        end    

        if k == 100 or k == 19 then
                right = true
        end    

        if k == 119 or k == 17 then
                up = true
        end

        if k == 115 or k == 18 then
                down = true
        end
        --else
        --      k = nil
        --end

end)


mouse.KeyUp:connect(function(key)
        --if player.PlayerGui.Playing.Value == true and player.PlayerGui.inGame.Value ~= "" or player.PlayerGui.Playing.Value == false and player.PlayerGui.inGame.Value == "" then
        k = string.byte(key)

        if k == 97 or k == 20 then
                left = false
        end

        if k == 100 or k == 19 then
                right = false
        end    

        if k == 119 or k == 17 then
                up = false
        end

        if k == 115 or k == 18 then
                down = false
        --end
        end
end)









function loop()
        if ball ~= nil then
        bVel.velocity = bVel.velocity * Vector3.new(friction,friction,friction)
        if left == true then
                        bVel.velocity = bVel.velocity - Vector3.new(2,0,0)
        end

        if right == true then
                        bVel.velocity = bVel.velocity + Vector3.new(2,0,0)
        end

        if up == true then
                        bVel.velocity = bVel.velocity - Vector3.new(0,0,2)
        end

        if down == true then
                        bVel.velocity = bVel.velocity + Vector3.new(0,0,2)
        end
        end
end

game:GetService("RunService").RenderStepped:connect(function()
        loop()
end)

--Camera Script--

local player = game.Players.LocalPlayer
local ball = nil
player.CharacterAdded:connect(function()
        wait()
        for i,v in pairs(game.Workspace:GetChildren())do
                if v.Name == "Ball" then
                        if v:FindFirstChild('Owner') then
                                if v.Owner.Value == player.Name then
                                        ball = v
                                end
                        end
                end
        end    
end)


function loop()
        if ball ~= nil then
                cam = game.Workspace.CurrentCamera
                cam.CameraSubject = ball
                cam.CameraType = "Scriptable"
                cam.CoordinateFrame = CFrame.new(ball.Position + Vector3.new(0,50,0)) * CFrame.Angles(-1.4,0,0)
        end
end

game:GetService("RunService").RenderStepped:connect(function()
        loop()
end)

Place

At first I thought it was the fact that I was using wait() instead of renderstepped, but that did nothing.

Thank you in advance :D