I haven't seen anyone compare Ruby to node perf, unless there's a non blocking variant of Ruby (looks like nio4r), in which case it would have similar perf.

Likewise node vs Python Tornado would be a good comparison.

Thing is, nio4r and Tornado aren't the standard library. Whereas node's stdlib is: node's file and socket read operations etc are non blocking, Python and Ruby equivs are not.

Also (addressing weird moderation - sudden downvotes when I mentioned other languages): please don't turn this into a lang tribal thing: I personally think Python is a better language than JavaScript, it just blocks by default. This isn't a matter of preference, it's a fact.