Critical performance & usability issues

[zardoy]

performance

• entities are not despawned on login packet causing memory leak
• geometry buffer data leak causing crashes on ios
• stat field not removed bugged, incorrect render order with entities
• inventory lags. Lag when start holding item
• entities animation poor performance
• entity tracker bad performance
• disable auto jump because of performance issues
• singleplayer: put chunk reader out of the main thread
• no occlusion culling
• bad performance with a lot of text (labels, signs)

usability

• incorrect player physics (the biggest issue for now)
• entities doesn't respect velocity and moves too fast
• horse & minecart support (easy)
• load lights in newer versions
• inventory no shift support
• bow, swords, food
• mining state bugs sometimes on target block change in mid
• [ ] unstable ping with proxy