Found this fix for the game on reddit which seems to fix the terrible stutter problems that people are having;
Is to create a shortcut to the games executable file “NMS.exe”. Then in the target window paste the following;
C:\Windows\System32\cmd.exe /c start “Process Monitor” /High “E:\GOG Games\No Man’s Sky\Binaries\NMS.exe” Note:
Replace “E:\GOG Games\No Man’s Sky\Binaries\NMS.exe”with the path to game on your system.
This fix doesn’t work for me and in fact seems to make the game perform even worse, its best to update to the “BETA / Experimental” Patches available on Steam and GOG.