Bad optimization of marine update!

The game of the principle is going fine, but it is starting to slow down in the water, or rather, in the ocean! How come?? That redstone mechanism almost does not slow down! But in the ocean, it's just something! 5 frames per second! What did I give money for? You may think that the phone is weak, but no! Xiaomi redmi 5 ( snapdragon 450) is far from weak! Please work on optimizing your "marine" update!!!