Test ndoe.js memory usage

test_memory_by_reading_file.js

/*
usage: nodejs test_memory_by_reading_file.js LARGE_FILE

It looks no memory limit for the process with node.js v0.10.38,
but single project cannot use more than ~2G.
*/
var sleep = require('sleep');
var fs = require('fs');
var bs = [];
for (var i = 0; i < 10; i++) {
  var b = fs.readFileSync(process.argv[2]);
  console.log(b.toString());
  bs.push(b);
}
sleep.sleep(1000);