Source code for test scripts

main.go

package main

import (
 "net/http"
 "log"
 "fmt"
)

func main() {
 http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
  w.Header().Set("Content-Type", "text/plain")
  fmt.Fprintf(w, "Hello, World\r\n")
 })

 log.Printf("Server running at http://127.0.0.1:1337/")
 http.ListenAndServe("0.0.0.0:1337", nil)
}

main.js

var cluster = require('cluster');
var http = require('http');
var numCPUs = require('os').cpus().length;

if (cluster.isMaster) {
  // Fork workers.
  for (var i = 0; i < numCPUs / 2; i++) {
    cluster.fork();
  }

  cluster.on('death', function(worker) {
    console.log('worker ' + worker.pid + ' died');
  });
} else {
  // Worker processes have a http server.
  http.Server(function(req, res) {
    res.writeHead(200, {'Content-Type': 'text/plain'});
    res.end("hello world\n");
  }).listen(1338, '0.0.0.0');
}

console.log('Server running at http://127.0.0.1:1338/');

See
https://gist.github.com/2722254

For results.

Not sure how relevant it is, but note that GOMAXPROCS variable used to default to 1.