When the animals like cow, pig, slime, etc. are going through their animation it is VERY choppy and lags even though the players movement is moving at an average of 30 FPS. This is the same with the flow when the lava and water begins to flow, there is a short pause between one frame of flowing and the other as it begins to flow outwards. In 14w27b the flow rate got better but it is still not normal behavior.