fs.fstat()

fstat.js

var fs = require('fs');

function callback(error) {
  if (error) {
    console.error(error);
    process.exit(1);
    return;
  }
  if (++count >= 1000000) {
    console.log((Date.now() - now) + 'ms');      
    process.exit();
    return;
  }
  fs.fstat(fd, callback);
}

var file = 'bench-fs-fstat';
fs.writeFileSync(file, '');
var fd = fs.openSync(file, 'r');
var now = Date.now();
var count = 0;
var concurrent = 32;
while (concurrent--) fs.fstat(fd, callback);