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

Run details:

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0

Browser: Firefox 115

Operating system: Windows 7

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

direct

390.7M/s

Object.hasOwnProperty

370.9M/s

Object in

367.3M/s

Array includes

115K/s

Array.indexOf

112K/s

View exact numbers

Test name	Executions per second
✓ direct	390,676,736 Ops/sec
Object.hasOwnProperty	370,905,728 Ops/sec
Object in	367,262,432 Ops/sec
Array includes	114,676 Ops/sec
Array.indexOf	112,268 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)