Jan 24, 2022 – Autodesk released the Autodesk AutoCAD 2021.1.1 Update Performance Hotfix
The AutoCAD 2021.1.1 Update Performance Hotfix is available via the Autodesk Desktop Connector app or via download from the Autodesk subscription site.
The update requires access to the original install resources.
AutoCAD 2021.1.1 Update Performance Hotfix
This hotfix requires AutoCAD 2021.1.1 Update to be installed in order to apply the update. Be sure your installation has all of its previous updates before installing this hotfix.
Fixed Issues
This Hotfix resolves an issue with increased DWG file sizes and slow performance when DISPSILH is set to 1.
See the AutoCAD 2021.1.1 Update Performance Hotfix release notes.