I thought you might be interested in looking at ArmA 3 goes to ~5 FPS after maybe 10 minutes.
https://forums.bohemia.net/forums/topic/166658-arma-3-goes-to-~5-fps-after-maybe-10-minutes/?do=findComment&comment=2610392
× Pasted as rich text. Restore formatting
Only 75 emoji are allowed.
× Your link has been automatically embedded. Display as a link instead
× Your previous content has been restored. Clear editor
× You cannot paste images directly. Upload or insert images from URL.