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/17.6 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

direct

11.6M/s

Object in

11.5M/s

Object.hasOwnProperty

11.5M/s

Array.indexOf

707K/s

Array includes

316K/s

View exact numbers

Test name	Executions per second
✓ direct	11,638,568 Ops/sec
Object in	11,548,817 Ops/sec
Object.hasOwnProperty	11,543,892 Ops/sec
Array.indexOf	707,461 Ops/sec
Array includes	316,310 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)