https://www.dsogaming.com/news/no-mans-sky-now-supports-the-vulkan-api-on-the-pc-improving-overall-performance/
 
Developer Hello games has brought about an update that brings a more subtle change: the game's API has been updated from OpenGL to Vulkan. The "behind the curtains" update has brought about improved performance across the spectrum of graphics cards that support that API renderer (in particular AMD users, as the patch notes themselves spell out), and, expectedly, an easier coding time for the developers. Improved HDR support was also coded into the game. 
 
No Man's Sky PC Vulkan Patch Release Notes

• OpenGL has been replaced by Vulkan. Many players, particularly players with AMD graphics cards, should see a performance improvement
• Revised HDR support, updated output curve in line with advances in HDR calibration
• Adaptive and Triple-Buffered V-Sync are now selectable from Graphics Settings
• Players with more than one GPU can now select which is used from Graphics Settings
• Changing the following settings no longer require restarting:
• Window Mode
• Resolution
• V-Sync
• Shadow Detail
• Reflection Quality
• The 'LOADING SHADERS' load step has been removed, improving the loading experience.
• Crash data is gathered via Steam to help us track down and fix issues.