The library differentiates itself from other implementations by transferring data directly between file pages mapped to memory by the mmap() function and the network stack. On high-bandwidth connections, it claims to be able to seed at three times the speed of the official client.
rTorrent uses ncurses and is suitable for use with screen; it uses commands such as Carriage return to load a torrent, after which ^S can be used to start a torrent (where ^ is shorthand for Ctrl key), backspace can be used to automatically start a torrent once it is loaded, making a subsequent issue of ^S unnecessary, ^K for stop, and ^D for pause, or if already paused or stopped, ^D again to delete the torrent. It supports saving of sessions and allows the user to add and remove torrents. It also supports partial downloading of multi-file torrents. In the release of rTorrent-0.7.0 support for BitTorrent protocol encryption was also implemented.PEX, DHT and initial seeding were recently implemented in rTorrent.