There's a major change in the rendering engine coming in the Beyond update for No Man's Sky, with OpenGL being dropped in favour of the Vulkan API, and there's some big performance improvements expected, although mainly for AMD card owners.

The update is currently on the experimental branch of the game, and reports suggest that there's some major performance improvements for AMD cards. Reports from PC Gamer suggest that the Radeon VII gets around 146 FPS at 1080p and an impressive 110 FPS at 1440p.

There's less improvement for NVIDIA card owners, though, but this is to expected as the AMD range of cards always performed much more poorly, and this is what the Vulkan update is primarily aimed at addressing. 

There's still a wait before the change comes to the main game, but if you're using an AMD card and want to check out the improvements now, you can do so by switching to the experimental branch. You can do this by going to the properties for the game in Steam, going to the "Betas" tab, and entering "3xperimental" into the text box, after which you should get the 3.8GB update.