Benchmark: array includes (worst case) vs object key

Script Preparation code:

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

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Includes
Object[key]

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.82 Safari/537.36

Browser/OS: Chrome 89 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Includes	15215020.0 Ops/sec
Object[key]	13872600.0 Ops/sec

array includes (worst case) vs object key (version: 0)

performance comparison of ways to find if an array contains a value

Comparing performance of: Includes vs Object[key]

Created: 3 years ago by: Guest

Jump to the latest result

Includes

Object[key]

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A