Write a UTP-based channel implementation
Steven has a "utp" branch in https://gitweb.torproject.org/sjm217/tor.git that begins to implement a UTP-based transport. It requires a tweaked libutp with patches from https://github.com/sjmurdoch/libutp
It is probably close to good enough for initial performance testing. This ticket is about making it good enough to merge, if the initial simulations and testing are promising.
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information