Performance tuning examines your graphics card and 3D display driver and determines whether to use software or hardware implementation for features that support both.
Features that cannot work properly on your system are turned off. Some features may work but not be recommended for use with your graphics card or 3D graphics display driver. Enable these features at your own risk. For information on the options available, see -3DCONFIG.
Graphics Caching
Graphics cache files are created and maintained to optimize performance and increase the regeneration speed of objects with complex geometry such as 3D solids, non-mesh surfaces, and regions. These cache files persist between drawing sessions and are saved in /Users/<user name>/Library/Application Support/Autodesk/local/<product name>/<release>/<language>/GraphicsCache. The maximum number of these cache files are limited in number and total size by the CACHEMAXFILES and CACHEMAXTOTALSIZE system variables. If the limits are exceeded, the oldest cache files are automatically deleted.