"There are changes in the master branch of Tornado on github to make Tornado multi-threaded, spawning a thread per CPU core, but this will not change the scaling concern and will complicate the equation a bit more"<p>Wrong. It forks.<p><a href="http://github.com/facebook/tornado/commit/6fb90ae694190fcedc48d9fb98b02325826d783e" rel="nofollow">http://github.com/facebook/tornado/commit/6fb90ae694190fcedc...</a>