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

Run details:

User agent: Mozilla/5.0 (iPhone; CPU iPhone OS 15_4 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Mobile/15E148 DuckDuckGo/7 Safari/605.1.15

Browser: Mobile Safari 15

Operating system: iOS 15.4

Device Platform: Mobile

Date tested: one year ago

Test name	Executions per second
Object.hasOwnProperty	2880876.0 Ops/sec
Object in	2683107.0 Ops/sec
Array.indexOf	167129.9 Ops/sec
direct	2912208.0 Ops/sec
Array includes	110005.9 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)

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

Object.hasOwnProperty

Object in

Array.indexOf

direct

Array includes