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 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Benchmark engine: Benchmark.js

Object in

56.8M/s

direct

55.6M/s

Object.hasOwnProperty

52.8M/s

Array.indexOf

775K/s

Array includes

756K/s

View exact numbers

Test name	Executions per second
✓ Object in	56,810,864 Ops/sec
direct	55,589,020 Ops/sec
Object.hasOwnProperty	52,774,416 Ops/sec
Array.indexOf	775,440 Ops/sec
Array includes	756,482 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)