Game Version:
0.14.1b [Linux]

System:
CPU: AMD Ryzen 5 3600
GPU: AMD Radeon RX 6700XT
RAM: 24 GB (DDR4)
Swap: 1TB
Drive: NVME M.2 SSD
OS: Endeavour OS
Kernel: 6.19.10-zen1-1-zen
Desktop Environment: KDE (Wayland)

Mods:
none

Link to Savegame: https://mega.nz/file/o0JFRRzb#BxgL0Edmqr8h4m48BsX-Emd4S5BLyYBngErHGCmvwfA

Hello,
Since Heleviel has been in my residence, the game has been having serious issues.
Saving the game now takes almost 3 minutes.
When I click the "Skip Turn 4x" button, the game completely freezes.
Even starting a new day (i.e., clicking "Finish Turn" at night) takes about 20–30 seconds.
I have no idea what to do. I already set autosaves to "every 10 turns," but that doesn’t help the gameplay… I can’t continue playing like this.

It seems you have a broken item on one of your characters. We can't yet figure out how those end up in the saves but you can fix it by opening the save in text file, finding "i349" (with quotes) and replace it with null (without quotes). Make sure to back it up before trying but it should make things less janky at least.

Thanks a lot, that actually solved the problem.

That mask that was causing it can often be bought from the Beastkin tribe,
and occasionally found as loot in a chest.

You sure it was the mask?