see above. Game is lagging (cant type in chat, cant eat sth., ...). if you try to save and exit to main menu minecraft crashes. no crash report was generated.
Environment
Windows 10 Pro 64 Bit
nvidia GeForce GTX1060 6GB
16GB hyperX RAM
240GB SSD with minecraft and windows running on it
i7 6700k @ 4.00 Base and 4.50 Turbo
My command works perfectly fine and I am using the same computer as you and the same version/snapshot