Run results for: Object.hasOwnProperty vs Object in vs Object[] vs Array.indexOf vs Array.includes vs Reflect.has()

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 17_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) EdgiOS/119.0.2151.96 Version/17.0 Mobile/15E148 Safari/604.1

Browser: Mobile Safari 17

Operating system: iOS 17.1

Device Platform: Mobile

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Object.hasOwnProperty

8.2M/s

Object in

8.0M/s

direct

8.0M/s

Object.prototype.hasOwnProperty.call(this.storeIndex, index)

5.5M/s

Reflect.has()

4.6M/s

Array.indexOf

665K/s

Array includes

99K/s

View exact numbers

Test name	Executions per second
✓ Object.hasOwnProperty	8,168,070 Ops/sec
Object in	8,043,128 Ops/sec
direct	7,986,789 Ops/sec
Object.prototype.hasOwnProperty.call(this.storeIndex, index)	5,494,832 Ops/sec
Reflect.has()	4,630,604 Ops/sec
Array.indexOf	664,790 Ops/sec
Array includes	98,611 Ops/sec

Script Preparation code:

  var object = {},
      array = [],
      i, test = 1000;
  
  for (i = 0; i < 1000; i++) {
   object['something' + i] = true;
   array.push('something' + i);
  }

Tests:

Object.hasOwnProperty
object.hasOwnProperty('something' + test)
Object in
('something' + test) in object
Array.indexOf
array.indexOf('something' + test) !== -1
direct
object['something' + test] === true
Array includes
array.includes('something' + test)
Object.prototype.hasOwnProperty.call(this.storeIndex, index)
Object.prototype.hasOwnProperty.call(object, 'something' + test)
Reflect.has()
Reflect.has(object, 'something' + test)