I LOVE oxygen not included

You didn't mention anything about your system.  CPU, memory, video card, etc...  I see you mentioned htop, which tells me you are using a Linux variant, which I have never used for ONI.

I am running on a pretty old Win 7 Pro computer: 3.5GHz i7-3770k (not overclocking at the moment), 32gb, a GTX 970 at 2560x1080 and a better-than-average SATA SSD.  When my 1560 cycle colony with 24 dups is paused in the background, my CPU usage is 20-22% and memory usage right after restarting and loading is about 5gb (it was over 8gb when I restarted it though).  I see no performance problems except if I am looking at the energy tab of a my main heavy wire (showing instantaneous usage and production) and try to pan the map.  Then it gets choppy.  Otherwise, it runs great even at the fastest speed.

There doesn't appear to be any disk load - at least while paused, so unless you are out of memory and swapping, your hard drive or ssd shouldn't be the cause of your performance issue.

It is very surprising that my 1560 cycle save file takes a full 58 seconds to load and 11 seconds to save, but what really blows me away is that it takes a full 92 seconds to "go to the main menu" from within a game!  It is literally 10 times faster to quit and re-launch the game to get to the main menu!  I'd say there is definitely room for improvement there...

For comparison, my 1766 cycle 30 dup colony took 63 seconds to load, consumes 6.4gb right after loading and 17-21% CPU while paused.  My 587 cycle 10 dup colony took 30 seconds to load, consumes 4.4gb right after loading and 18-21% CPU while paused.

I would love to hear other people's load/save times and their computer specs...

 

Just noticed that you uploaded a save file.  When I loaded your file (711 cycles 43 dups), it took 73 seconds, consumes 5.6gb right after loading and 11-13% CPU while paused in the background.   Scrolling around your map for a minute while paused caused the memory usage to increase to 6.7gb, and paused CPU to increase to 13-16%.

Hope that helps...

Misca

Edited August 14, 2020 by Misca

@Misca

In my case I never re-load game. It is 3 times faster to quit game and load from fresh.
I can propose an explanation for that: when game is loaded for first time, intricate layout of objects is created. When re-loading, these objects are not dropped at once, but are gradually deleted, increasing ops and CPU cache thrasing.

I am trying to squeeze maximum possible performance from i7 2.3GHz 4core/8ht,  16GB ram.
I have GT650M. Do you think there is a dependency between gpu and performance problems?
Actually, I installed linux ubuntu on this computer specially to play ONI. For some time it performed better then on Win10, but somehow it has
leveled now, and graphics on linux is far inferior. Still, it is much easier for me to inspect process on linux then on windows.

I have not observed any disk IO when I play.

Best regards,
Adam