[posila] [for 0.17] [0.15.2] Low fps when game window is active (caused by NVIDIA G-Sync)

[Bart]

I started a game in 0.14. Link: http://lingen.nu/lowfps.zip

When I open the game in 0.15.2, the framerate is very low, but the problem isn't low ups. I know this because I have a dual screen setup. When I'm typing this, the Chrome-windows is active, and Factorio is running at 60fps on my other monitor. When I go back to the game, it slows down to 20fps. Screenshots:


In the above picture, Chrome is active.


In this picture, the game is active. Why is the fps so low? It was way better in 0.14.

[posila]

Hi, try to disable G-sync for windowed applications (or just for Factorio). For some reason, g-sync behaves like this with Factorio sometimes.

[Bart]

That fixed the problem, thnx!

For other people with the same problem, this is the way to go:

[exi123]

Anyone else struggeling with this behaviour in factorio without a multimonitor setup? i have massive perfomance issues with jumping fps and i dont know why. the ups are on 60, but the fps are jumping from 30-55...

[Harkonnen]

I have noticed that DirectX applications are dropping to 20fps when you switch windows with Win-Tab (that is when they are shown as slides in 3D). So I think this problem is caused by Windows treating Factorio as background app when it's actually foreground.

[posila]

Hello, we are rewriting our rendering code to use DirectX 11 instead of DirectX 9 for 0.17, so let me know if it still happens in 0.17