This allows you to write protocols for UDP, multicast and TCP in C++. In theory this can make the protocol much faster since it's easier to prevent data copying etc.. The TCP writing support is not efficient yet, though, as it still uses Twisted's current buffering system. Tested with 1.3.0 and 2.0 from trunk. No API stability guaranteed. http://itamarst.org/software/fusion-0.1.tar.gz or sandbox/itamar/cppreactor in Twisted SVN. Disclaimer: if you want to make your Twisted code go faster this is NOT the first thing you should try. Nor the second, third or fourth. -- Itamar Shtull-Trauring http://itamarst.org