The game starts to stutter after 20-30 minutes of playing.

I've noticed it as well, thought I was the only one.

As you can see, this stutter has nothing to do with FPS (Geforce RTX 3050 Laptop GPU, Windows 11). So I'm guessing DST has some sort of memory management issue with Nvidia drivers - other games don't have this problem.

 

This problem also occurs on the Linux version of the game:

 

 

 

Edited April 15, 2023 by Fomalhaut

I think I just found a solution that seems to work: Nvidia control panel and changing "Vulkan/OpenGL present method" to "prefer native" – this change seems to have solved the graphics stuttering issue (or greatly delay it).

Edited April 18, 2023 by Fomalhaut

It's been years but after all the internet digging, I finally found the solution that completely resolve it (for me at least).
Solution:
A. If you only play on laptop monitor => I have no idea but using running the game on Integrated graphic card works perfectly.
B. If you have 2 monitors (laptop + external monitor, also my situation). You have to set both monitors to the same refresh rate (60Hz). This is called "Windows + Optimus + mixed refresh rate desync"

Everything else just didnt work me, Ive tried turning on/off vsync, triple buffering, gsync, etc,... nothing works.
Explanation I found 
When the two displays run at different refresh rates (e.g. 144Hz + 60Hz):

• Windows’ compositor + NVIDIA present queue has to sync two different clocks
• Even if the game shows perfect 60 FPS (16.6 ms), frames get:
  • queued unevenly
  • presented at inconsistent intervals
  • result in visible micro-stutter without frame time spikes