text: var http = require('http');
  
  if (null == process.env.WORKER_ID) 
      throw new Error("env.WORKER_ID not set!");
  
  var s = http.createServer(function(req, res) {
      var params = req.url.split('/').slice(1);
      setTimeout(function() { 
          res.writeHead(200);
          res.end("hello world\n");
      }, params[0] || 1);
  });
  
  
  s.listen(9001);
  
  setTimeout(function() {
      process.send({cmd:'ready'});
  }, 200);
  
  