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

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36

Browser: Chrome 92

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Object.hasOwnProperty	1543042.4 Ops/sec
Object in	1357842.9 Ops/sec
Array.indexOf	225389.0 Ops/sec
direct	1729548.6 Ops/sec
Array includes	217106.8 Ops/sec
Set has	1822450.8 Ops/sec

Script Preparation code:

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

Tests:

Object.hasOwnProperty
object.hasOwnProperty('something' + Math.floor(Math.random() * 1000))
Object in
('something' + Math.floor(Math.random() * 1000)) in object
Array.indexOf
array.indexOf('something' + Math.floor(Math.random() * 1000)) !== -1
direct
object['something' + Math.floor(Math.random() * 1000)]
Array includes
array.includes('something' + Math.floor(Math.random() * 1000))
Set has
set.has('something' + Math.floor(Math.random() * 1000))

Run results for: random 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