Autodesk Revit 2011 optimized file loading by using multiple CPU threads to transfer model data to RAM; maximizing the use of computational resources required to open a model. Since the slowest performing hardware in a computer is often static data storage, usually a hard drive, Revit employs an “in memory” data model, taking advantage of much faster RAM to manage the model in an editing session. Due to the constricted performance represented by hard drive access, it is recommended, that whenever possible, to prevent the underlying Windows operating system (OS) from caching active model data to the hard drive.