Villagers cause a lot of lag in the world

In the current version, when villagers pathfind to their job blocks, it causes the world to lag (not FPS lag, but all entities move in slow motion). Having around 15-20 villagers in one area pathfinding at once is enough to cause a lot of lag even on a good pc that has no performance issues. I don't know if this is realted to anything else with villagers but to me it seems to happen when they pathfind or look for their job blocks, other times its fine.