Benchmarking hasOwnProperty vs. conditional test for property

bench.js

var Benchmark = require('benchmark');
var suite = new Benchmark.Suite;

var req = {
  someProperty: "some value"
};

var property = "someProperty";
var notAProperty = "someProperty";

suite.add('with conditional test', function() {
  if (!req[property])
    return false;
}).add('with hasOwnProperty', function() {
  if (!req.hasOwnProperty(property))
    return false;
}).add('negative with conditional test', function() {
  if (!req[notAProperty])
    return false;
}).add('negative with hasOwnProperty', function() {
  if (!req.hasOwnProperty(notAProperty))
    return false;
}).on('cycle', function(event) {
  console.log(String(event.target));
}).on('complete', function() {
  console.log('Fastest is ' + this.filter('fastest').pluck('name'));
}).run({ 'async': true });

results.txt

with conditional test x 62,329,924 ops/sec ±0.10% (97 runs sampled)
with hasOwnProperty x 13,004,569 ops/sec ±0.35% (98 runs sampled)
negative with conditional test x 53,166,225 ops/sec ±0.12% (90 runs sampled)
negative with hasOwnProperty x 12,297,098 ops/sec ±0.10% (95 runs sampled)
Fastest is with conditional test