forge version: 47.3.0
mod version: 2.0.2
When Tremorzilla begins to charge up, the fps can drop to 12 until the end of beam attack. The only way to keep the fps normal is to turn my back on Tremorzilla during this process. This has nothing to do with other mods, I tried to install only this mod but this didn't change the situation. This also has nothing to do with blocks destruction as the lag occurs at the beginning of the charge.
Update: I think it's the glowing texture of its back plates and beam that causes the lag.