Run results for: Object.hasOwnProperty vs Object in vs Object[] vs Array.indexOf vs Array.includes

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.1.2 Safari/605.1.15

Browser: Safari 17

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Object.hasOwnProperty

13.5M/s

direct

13.4M/s

Object in

13.3M/s

Array.indexOf

745K/s

Array includes

76K/s

View exact numbers

Test name	Executions per second
✓ Object.hasOwnProperty	13,475,907 Ops/sec
direct	13,377,507 Ops/sec
Object in	13,344,335 Ops/sec
Array.indexOf	744,508 Ops/sec
Array includes	75,953 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)