When moving on the campaign map on day 78, I gained a level of scouting and then the frame rate immediately tanked. I saved it as “dey Barr.sav”, restarted my computer and it is reproducible. Upon loading “dey Barr.sav”, performance is terrible, “autosave3.sav” is only a few minutes before this, and performance is fine. I did not continue to play on as it was too painful.
“DxDiag.txt” is here – https://disk.yandex.com/d/GtC4TMMlXO1Hzg
“Dey Barr.sav” is here – https://disk.yandex.com/d/9UFar0tWwivIbA
“autosave3.sav” is here – https://disk.yandex.com/d/erFxMOpjHDLqFA
No cheats or console, no mods (other than Birth and Death Options), all modules 1.8.0.315545
“DxDiag.txt” is here – https://disk.yandex.com/d/GtC4TMMlXO1Hzg
“Dey Barr.sav” is here – https://disk.yandex.com/d/9UFar0tWwivIbA
“autosave3.sav” is here – https://disk.yandex.com/d/erFxMOpjHDLqFA
No cheats or console, no mods (other than Birth and Death Options), all modules 1.8.0.315545