Reflect.defineProperty

reflect.js

/**
$ node node/reflect.js
Reflect x 3,102,490 ops/sec ±5.31% (78 runs sampled)
Normal x 61,204,978 ops/sec ±5.73% (86 runs sampled)
Fastest is Normal
*/

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

class ReflectMe {
  constructor () {
    Reflect.defineProperty(this, '_name', {
      writable: true,
    });
  }
}

class Normal {
  constructor () {
    this.name = 'aschen'
  }
}

let ret;
// add tests
suite
.add('Reflect', function() {
  ret = new ReflectMe();
})
.add('Normal', function() {
  ret = new Normal();
})
// add listeners
.on('cycle', function(event) {
  console.log(String(event.target));
})
.on('complete', function() {
  console.log('Fastest is ' + this.filter('fastest').map('name'));
})
// run async
.run();