[1.0.0] FPS drops to 5 every 5 minutes

[Inkvatordor]

After running game and playing for ~5 minutes my FPS drops to 5 and lower. If i wait some it raises again to ~60, but after ~5 minutes it drops again. My base is small, and i never expirienced this before. I tried to stop all work on my factory and run away from it but it didn't help. I thought it happening because my PC overheating but it's not.

[valneq]

Considering this is only an FPS and not a UPS issue, have you tried playing around with the graphics options?
Sometimes it helps to turn on/off vsync, or the usage of the flip presentation model.

[Inkvatordor]

Yes i tried to turn everything off but that didn't helped

[Rseding91]

To put it simply: *damn* that is an old and weak GPU (9500 GT from 2009). Comparing it to my 1660 TI (a mid-range graphics card from 2019) my GPU is 92 times more powerful.

You need to drastically lower the graphics quality: change it to "normal". If that doesn't work; you just need a newer computer. Sorry.

[Inkvatordor]

Even on lowest graphics FPS suddenly changes from 60 to 5, from 5 to 60, from 60 to 5 etc. I tried to stop all work on my base, but it didn't help. My PC is weak, but i used to play on bigger base and everything were alright. Even before this problem happend to me my FPS were around 60, and 30 near steam engines and furnaces.

[Loewchen]

Try deactivating vsync or running it on opgengl.

[Zavian]

Looking at the images in the OP, I'm wondering whether the performance drops might be tied to Factorio's day/night cycle. In the images in the OP the light composition step (amongst others) takes significantly longer during twilight/night.

It might be worth testing with Factorio set to always day, to see whether that helps. https://wiki.factorio.com/Console#Turn_off_night