Hello. I accidentally posted this is the release bug section earlier.
My friends were reporting an issue with the Mig-21 Fishbed. Upon further testing of the issue with them, we found that the server (and single-player) will lag and almost crash when the Mig-21 get parallel to another Mig-21.
If you get close, all clients will stutter and the server will show the DCS spash screen. If you are parallel but not right next to one another, the stutter will go away.
This issue just came up since the recent update to release as yesterday we were not having this performance issue.
What we have tested so far that has induced stutter
First and third person. Both on ground and in air, parallel, close.
Looking away from aircraft.
Private/public server as well as single player.
Starting on ground, cold and/or hot, side-by-side.
Starting in air side-by-side.
What we have not tested ourselves
Client graphic settings.
Other aircraft next to the Mig-21
Here is a video of one of the many tests.