Run results for: property access: object with define property vs Proxy get

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:128.0) Gecko/20100101 Firefox/128.0

Browser: Firefox 128

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

defineProperty

5.9M/s

getter

5.5M/s

Proxy

4.8M/s

View exact numbers

Test name	Executions per second
✓ defineProperty	5,918,428 Ops/sec
getter	5,462,940 Ops/sec
Proxy	4,833,680 Ops/sec

Script Preparation code:

const queryResults = {
  a: {},
  b: [2, 3, 4],
  c: 3,
  d: {
    a: 1,
    b: [],
  },
};

window.trackedResultsProxy = new Proxy(queryResults, {
  get(target, prop, receiver) {
    return Reflect.get(target, prop, receiver);
  }
});

window.trackedResultsDefineProperty = {};
for (const key of Object.keys(queryResults)) {
  Object.defineProperty(trackedResultsDefineProperty, key, {
    configurable: false,
    enumerable: true,
    get() {
      return queryResults[key];
    },
  });
}

window.trackedResultsGetter = {
  get d() {
    return queryResults.d;
  }
}

Tests:

Proxy
window.trackedResultsProxy.d.a + 5
defineProperty
window.trackedResultsDefineProperty.d.a + 5
getter
window.trackedResultsGetter.d.a + 5