A FileSystem that uses memory to simulate a traditional disk partition in order to offer greatly accelerated access times to its contents. In constrast to a [RamDisk] it does not simulate a block device, so it can grow and shrink as needed to accomodate the files it hosts. Together with the large amounts of RAM modern machines are typically equipped with, its impact on the memory available to other processes is nowadays often negligible. Because it does not occupy a disk [Partition], files stored on a [Tmpfs] vanish when the system shuts down. 

  

 Any partition that will have many, frequently accessed, small files which do not require permanent storage is a good candidate for [Tmpfs]. Of all the directories in the FileSystemHierarchy, __/tmp__ is the canonical candidate.