Benchmarks

As this syns is made between 2 local databases, no HTTP is involved here, so that's another reason why it's so much faster than ZMQ. To test against HTTP, you'd need to launch a WSGI server, for example [using paste](http://bazaar.launchpad.net/~ubuntuone-control-tower/u1db/trunk/view/head:/u1db/commandline/serve.py) or [wsgiref](http://bazaar.launchpad.net/~ubuntuone-control-tower/u1db/trunk/view/head:/u1db/tests/__init__.py#L355).