Benchmark: array includes vs object[key] vs key in object

Script Preparation code:

var obj = (new Array(1000)).fill(null).reduce((prev, newVal) => {prev[Math.random() + ''] = Math.random() + ''; return prev; }, { sausage: 'tst' });
var array = Object.keys(obj);

Tests:

Includes
array.includes('sausage')
Object[key]
obj['sausage']
key in object
'sausage' in obj

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Includes
Object[key]
key in object

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/110.0

Browser/OS: Firefox 110 on Windows

View result in a separate tab

Test name	Executions per second
Includes	98021940.0 Ops/sec
Object[key]	2417126000.0 Ops/sec
key in object	2326707000.0 Ops/sec

array includes vs object[key] vs key in object (version: 0)

Performance test on array.includes, object[key] accessor and key in object check

Comparing performance of: Includes vs Object[key] vs key in object

Created: one year ago by: Guest

Jump to the latest result

Includes

Object[key]

key in object

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A