Script runs smoothly in studios but barley works and is slow in game?

So this is a local script inside StarterPlayer scripts. There are 2 blocks in workspace called HOVER_WORK and HOVER_WORK1. It runs perfectly in Roblox Studios, but however when trying to do it in game it rather dosent do it or it does a long time after you hovered your mouse over it. The script works, its just frustratingly slow. I guess if someone can make this work without out the whole "Look around" thing that would be nice to. any help?

game.Workspace.HOVER_WORK1.ClickDetector.MouseHoverEnter:Connect(function()

local lookaround = 1

lookaround = math.rad(lookaround)

  

local player = game.Players.LocalPlayer

local cam = workspace.CurrentCamera

local mouse = player:GetMouse()

local subject = workspace.CamPos1

  

local measure = Instance.new("ScreenGui",player.PlayerGui)

local screensizex = measure.AbsoluteSize.X

local screensizey = measure.AbsoluteSize.Y

measure:Destroy()

wait()

  

print("Done")

cam.CameraType = Enum.CameraType.Scriptable

  

while true and wait() and player.Character.Humanoid.Health ~= 0 and subject do

cam.CoordinateFrame = subject.CFrame * CFrame.Angles(lookaround*(((screensizey/2)-mouse.Y)/screensizey)*2,lookaround*(((screensizex/2)-mouse.X)/screensizex)*2,0)

end

cam.CameraType = Enum.CameraType.Custom

  

end)

  

  

game.Workspace.HOVER_WORK.ClickDetector.MouseHoverEnter:Connect(function()

local lookaround = 1

lookaround = math.rad(lookaround)

  

local player = game.Players.LocalPlayer

local cam = workspace.CurrentCamera

local mouse = player:GetMouse()

local subject = workspace.CamPos

  

local measure = Instance.new("ScreenGui",player.PlayerGui)

local screensizex = measure.AbsoluteSize.X

local screensizey = measure.AbsoluteSize.Y

measure:Destroy()

wait()

  

print("Done")

cam.CameraType = Enum.CameraType.Scriptable

  

while true and wait() and player.Character.Humanoid.Health ~= 0 and subject do

cam.CoordinateFrame = subject.CFrame * CFrame.Angles(lookaround*(((screensizey/2)-mouse.Y)/screensizey)*2,lookaround*(((screensizex/2)-mouse.X)/screensizex)*2,0)

end

cam.CameraType = Enum.CameraType.Custom

  

end)