Run results for: Object.hasOwnProperty vs Object in vs Object[] vs Array.indexOf vs Array.includes 50k

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_1) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0.1 Safari/605.1.15

Browser: Safari 12

Operating system: Mac OS X 10.14.1

Device Platform: Desktop

Date tested: 6 years ago

Test name	Executions per second
Object.hasOwnProperty	3677822.2 Ops/sec
Object in	3562511.0 Ops/sec
Array.indexOf	3083.4 Ops/sec
direct	3514136.8 Ops/sec
Array includes	3155.7 Ops/sec

Script Preparation code:

  var object = {},
      array = [],
      i, test = 50000;
  
  for (i = 0; i < 50000; 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)

Run results for: Object.hasOwnProperty vs Object in vs Object[] vs Array.indexOf vs Array.includes 50k

Object.hasOwnProperty

Object in

Array.indexOf

direct

Array includes