Django Gunicorn Long Polling
Gunicorn by default will spawn regular synchronous WSGI processes. You can however tell it to spawn processes that use gevent, eventlet or tornado instead. I am only familiar with gevent which can certainly be used instead of Node.js for long polling.
The memory footprint per process is about the same for mod_wsgi and gunicorn (in my limited experience), but you get more bells-and-whistles with gunicorn. If you change the default worker class to gevent (or eventlet or tornado) you also get a LOT more performance out of each process.
Is using Django with gunicorn is considered to be a replacement for using evented/async servers like Tornado, Node.js, and similar ? Additionally, Will that be helpful in handling long-polling/cometed services?
Finally, is Gunicorn only replacing the memory consuming Apache threads (in case of Apache/mod-wsgi) with lightweight threads, or there are an additional benefits?