fs.createWriteStream with large data

wstream.js

var fs = require('fs');
var stream = fs.createWriteStream(__dirname + '/out.txt');
var str = 'hogehogefugafugafoobarpiyo[';

for ( var i=0; i < 1000000000; i++) { // 1Gtimes
  stream.write(str + i + ']\n');
}

stream.on('drain', function() {
  console.log('drain'); // never happen
});

var fs = require('fs');
var stream = fs.createWriteStream(__dirname + '/out.txt');
var str = 'hogehogefugafugafoobarpiyo[';
var i = 0;

stream.on('drain', function() {
  write();
});
write();

function write() {
  while (i < 1000000000) { // 1Gtimes
    if (!stream.write(str + (i++) + ']\n')) {
      return;
    }
  }
  stream.end();
}

I totally forgot the fact that node.js is a single thread model...