It's the View distance causing the stuttering anything above 128 (like it's loading chunks when moving), this is not a framerate issue, the frame rate is a smooth 60fps.
all the other settings effect the FPS not the stuttering.
i7 9700k, RX 5700, 16gb ram, 1TB SSD Windows 10.
Single player, game length doesn't matter, memory usage is over 3GB.
How do you run commands in game, I will try the command /debug logticks 100. if I find out how.