Yet another new major of vty has been produced. While I had hoped this compatibility break would never be needed, it seems vty 2's lazy lists and unpacked records were preventing good performance, so the level of abstraction has been increased by creating opaque types Image and Attr. Internally, the new Image uses side effectful array update (unsafePerformIO is not needed because it can only be read by the IO-using update procedure), and the new Attr uses bit flags packed into a single Word#. Yi, using the new release, has doubled in speed with no additional tuning. There are no other notable API changes. (although internally a Cursor-level control module has been factored out, perhaps in preparation for being exposed) As always, feedback is appreciated. Stefan Tar: http://members.cox.net/stefanor/vty/dist/vty-3.0.0.tar.gz Haddock: http://members.cox.net/stefanor/vty/dist/doc/html/index.html Darcs: darcs get --tag=rel-3.0.0 http://members.cox.net/stefanor/vty/