All about optimization

[bytesleuth]

You are wrong.

while task.wait() do

end

and

game:GetService("RunService").Heartbeat:Connect(function()

end)

are the same performance wise

LuaU shenanigans

Any calls to task.wait will be resumed at the same time as the Heartbeat event so event choice aside there should not be a noticeable difference in performance unless you introduce a memory leak in one but not the other.