mysql parallel SELECT

var mysql = require('mysql'),
	http = require('http');

var connections = [null, null, null].map(function(){
  var connection = mysql.createConnection({
      host     : 'localhost',
      database : 'benchmark',
      user     : 'root',
      password : '1234'
    });

  connection.connect();
  return connection;
});

http.createServer(function(req, res){
	var state = {
		foo: false,
		bar: false,
		baz: false
	};

	var done = function( tbl ){
		state[ tbl ] = true;
		if( state.foo && state.bar && state.baz ){
			res.end('OK');
		}
	};

	connections[0].query('SELECT * FROM foo', function(err, rows, fields) {
		done('foo');
	});

	connections[1].query('SELECT * FROM bar', function(err, rows, fields) {
		done('bar');
	});

	connections[2].query('SELECT * FROM baz', function(err, rows, fields) {
		done('baz');
	});

}).listen(3000);