The Long Dark has been updated to version 1.97 today by Hinterland Studio. You can find out the complete patch notes for this update from here.
A lot of optimization has been carried out in this update. Some of this is specific to a single platform e.g PlayStation 4 or Nintendo Switch. Other changes include bug fixes and more. The official patch notes are posted on the support website, but you can also have a look at the changes below.