Readme.md

Sinatra

ruby 1.9.2 + async_sinatra + thin thin start

ab -n 10000 -c 100 http://localhost:3000/
-> 49ms / request

Node

node server.js

ab -n 10000 -c 100 http://localhost:3000/
-> 20ms / request

config.ru

#!/usr/bin/env
require 'sinatra/async'

class AsyncTest < Sinatra::Base
  register Sinatra::Async

  aget '/' do
    body "hello async"
  end
end

run AsyncTest.new

server.js

// Load the http module to create an http server.
var http = require('http');

// Configure our HTTP server to respond with Hello World to all requests.
var server = http.createServer(function (request, response) {
  response.writeHead(200, {"Content-Type": "text/plain"});
  response.end("Hello World\n");
});

// Listen on port 8000, IP defaults to 127.0.0.1
server.listen(3000);

// Put a friendly message on the terminal
console.log("Server running at http://127.0.0.1:8000/");

I don't think it's fair comparison because Sinatra is having more features.
So, put something on to node server.js(such as express so that it can match sinatra)
and test again.

Or you could go the other way and benchmark a straight Rack "Hello World" application.

feel free to fork :)

With ruby 1.9.3 I got about 98ms with ruby and 21ms with node 0.6.18