n my Minecraft world it was started get choppy and when i placed a block and it disappeared and then i restarted my minecraft and when i loaded back into the world it took forever and it was all my ram and then the game crashed

on my Minecraft world it was started get choppy and when i placed a block and it disappeared and then i restarted my minecraft and when i loaded back into the world it took forever and it was using  all my ram and then the game crashed