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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser: Chrome 134

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

defineProperty

104.8M/s

Control (plain object access)

103.4M/s

getter

48.0M/s

Proxy

21.3M/s

View exact numbers

Test name	Executions per second
✓ defineProperty	104,766,672 Ops/sec
Control (plain object access)	103,376,792 Ops/sec
getter	47,965,388 Ops/sec
Proxy	21,259,792 Ops/sec

Script Preparation code:

const queryResults = {
  a: {},
  b: [2, 3, 4],
  c: 3,
  d: {
    a: 1,
    b: [],
  },
};

window.queryResults = queryResults;

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
Control (plain object access)
window.queryResults.d.a + 5