World Corruption due to villagers + World slowdown when entering a village

When I enter my village, (Converted village) My world slowdown like a server lag and later, crashes.

It looks like the mobs and everything stops and freeze, later on...they move very quickly including the sounds.

When it crashed, It corrupts my world. Now, my level.dat file is corrupted too.

Unfortunately, no screenshots due to frequent crashes.

and no world file because the world is 57MB