Villagers can now work without also restocking at the same time.Improved performance of Villager pathfinding.
Please include this while making bug reports about performance! Aside from new features, 1.15 will also focus on quality and performance improvements. Today we're releasing 1.14.4, a release that addresses left over issues from 1.14. We plan on this being the final release for 1.14 and we'll continue our efforts on 1.15.