node/benchmark/dns/lookup.js at 5e7c8da2ea999592ae876a05680045687764c46a · nodejs/node · GitHub

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'use strict';

const common = require('../common.js');
const lookup = require('dns').lookup;

const bench = common.createBenchmark(main, {
  name: ['', '127.0.0.1', '::1'],
  all: [true, false],
  n: [5e6]
});

function main(conf) {
  const name = conf.name;
  const n = +conf.n;
  const all = !!conf.all;
  var i = 0;

  if (all) {
    const opts = { all: true };
    bench.start();
    (function cb(err, results) {
      if (i++ === n) {
        bench.end(n);
        return;
      }
      lookup(name, opts, cb);
    })();
  } else {
    bench.start();
    (function cb(err, result) {
      if (i++ === n) {
        bench.end(n);
        return;
      }
      lookup(name, cb);
    })();
  }
}