when a raid is started it starts to lag all mobs in the world nether and overworld. the game was having delays of ~ 0.5 sec. so you feel like all the mobs are teleporting and unresponsive. you as the player could move around normally but all of the mobs would freeze and then teleport to a few blocks away. 

What I expected to happen was...:
Mobs should work, and move around normally, and not lag out as soon as you start a raid. 

What actually happened was...:
I was playing minecraft on 1.18 on my survival world and I started a raid. I then tried to hit a pillager and I got killed by it because I was unable to hit it because my game strted to be unresponsive. I first thought it was a problem with enteties so put down my render distance to it's minimum but that did not work. Then I checked my Cpu performance to see if it was my cpu that was having trouble and I saw that minecraft used 200% of the cpu. I tried enhancing the performance of the cpu and that didn't work. I tried to run a other cpu game that was demanding on the Cpu and that worked. the game was having delays of ~ 0.5 sec. so you feel like all the mobs are teleporting and unresponsive. i still have 31 gb of memory on my computer, I don't have a problem with my Ram. 

Steps to Reproduce:
1. start a level 2 raid.

2. do the raid at night

3. Do the raid in 1.18