Villagers working cause game to slow down significantly

Summary:
Villagers working cause the game to slow down significantly. The more working villagers there are, the slower the game gets.

Steps to Reproduce:

1. Create a new world.
2. Place down 20 beds and workstation blocks.
3. Spawn 20 villagers.
4. Wait for the villagers to go to work.
5. Everything should now be slowed down. Try to hit one of the villagers, restore hunger, throw an item, or set yourself on fire.

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Original Description:
The village I'm at plays in slow motion. Only I can move normally. Damage semms to also be slowed down since the iron golems take longer to die. Every entity that enters those chunks slow down as well. Every entity leaving moves normally.