Programmable Filter computation

Hello,
I’d like to know how the programmable filter computes- does it calculate every timesteps whenever I press the apply button, or does it calculate each timestep individually when I press the Play button?

Thank you in advance.

The Programmable Filter's calculations are executed just like any other filter in ParaView’s pipeline. Filters are generally executed on an as-needed basis. The mechanics can get complicated, and I won’t try to go into details. Generally, it will calculate each timestep individually when you press the Play button.