Object.prototype.hasOwnProperty vs Object in vs Object[] vs Array.indexOf vs Array.includes vs Set.has
Date tested:
3 years ago
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/95.0.4638.54 Safari/537.36
Test name
Executions per second
Object.prototype.hasOwnProperty
4189001.0 Ops/sec
Object in
5519183.0 Ops/sec
Array.indexOf
1088871.1 Ops/sec
direct
5581476.0 Ops/sec
Array includes
1091575.6 Ops/sec
Set has
6293361.0 Ops/sec
Benchmark definition (click to collapse):
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.prototype.hasOwnProperty
Object.prototype.hasOwnProperty.call(object, '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)
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