EngineIterationsPerSecond Property

The number of fixed iterations per second. This controls how often physics simulation and _PhysicsProcess(Single) methods are run. This value should generally always be set to 60 or above, as Godot doesn't interpolate the physics step. As a result, values lower than 60 will look stuttery. This value can be increased to make input more reactive or work around tunneling issues, but keep in mind doing so will increase CPU usage.