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 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36 Edg/125.0.0.0

Browser: Chrome 125

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Object.hasOwnProperty

11.9M/s

Object in

11.1M/s

direct

11.0M/s

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

7.4M/s

Reflect.has()

6.2M/s

Array.indexOf

1.4M/s

Array includes

1.4M/s

View exact numbers

Test name	Executions per second
✓ Object.hasOwnProperty	11,912,045 Ops/sec
Object in	11,115,542 Ops/sec
direct	10,958,311 Ops/sec
Object.prototype.hasOwnProperty.call(this.storeIndex, index)	7,371,888 Ops/sec
Reflect.has()	6,152,985 Ops/sec
Array.indexOf	1,372,084 Ops/sec
Array includes	1,362,670 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)