Same issue on my side, looks like a memory leak: RAM usage gets up to 4,5GB after which the Minecraft UI freezes (but sounds can still be heard), also pressing Esc repeatedly seems to pause/unpause the game, although the image remains frozen (FPS in F3 cam go all low as 0-7 at times)
The issue can be avoided by reducing the number of loaded chunks from 32 to 12, the memory consumption sinks to about 3GB and the game does not freeze anymore, however it is still laggy at times
Same issue on my side, looks like a memory leak: RAM usage gets up to 4,5GB after which the Minecraft UI freezes (but sounds can still be heard), also pressing Esc repeatedly seems to pause/unpause the game, although the image remains frozen (FPS in F3 cam go all low as 0-7 at times)
A dump file can be found here: https://drive.google.com/open?id=1LvcojxlYEe7hzN7I_lF5FMGwLsE680_r
JVM Args: -Xmx2G
issue still reproducible in snapshot 20w10a
The issue can be avoided by reducing the number of loaded chunks from 32 to 12, the memory consumption sinks to about 3GB and the game does not freeze anymore, however it is still laggy at times