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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser: Chrome 122

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 8 months ago

Test name	Executions per second
Object.hasOwnProperty	9447518.0 Ops/sec
Object in	9155752.0 Ops/sec
Array.indexOf	1146320.6 Ops/sec
direct	9119941.0 Ops/sec
Array includes	1151106.8 Ops/sec
Set has	8370762.5 Ops/sec

Script Preparation code:

  var object = {},
      array = [],
      set = new Set(),
      i, test = 1000;
  
  for (i = 0; i < 1000; i++) {
   object['something' + i] = true;
   array.push('something' + i);
   set.add('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)
Set has
set.has('something' + test)

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

Object.hasOwnProperty

Object in

Array.indexOf

direct

Array includes

Set has