Affects Version/s: Minecraft 14w25a, Minecraft 14w25b
Fix Version/s: None
Environment:64-bit Windows 7; Java 7; 1G RAM allocated; 9.4 GhZ CPU, 2GB GPU, 4GB RAM on computer
In any world on peaceful, mobs will rapidly attempt to spawn, spawn, then despawn(due to the world being on peaceful). This creates a substantial amount of lag, as mobs attempt to spawn every 3-20 game ticks. This happens on all 5 worlds created in 14w25b and all 5 worlds created in 1.7.9.
1. Open any world
2. Set difficulty to peaceful
3. Mobs flash before they spawn and despawn
Easiest to see mobs flash on superflat(slime spawns)