After unpacking, a portable version uses roughly 30% less background processes than an installed copy.
While the 2016 version is no longer the primary download, Autodesk provides a support page for previous versions . Autodesk DWG TrueView | DWG Viewer download DWG TrueView 2016 portable 64 bit
If the search for DWG TrueView 2016 portable 64-bit proves impossible, consider these modern alternatives: After unpacking, a portable version uses roughly 30%