I thought you might be interested in looking at ArmA 2 OA Performance Issues since 1.59.
https://forums.bohemia.net/forums/topic/113628-arma-2-oa-performance-issues-since-159/?do=findComment&comment=1884890
× 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.