Benchmark: Object.entries VS Object.keys VS Object.keys with extra array VS Object.entries without array 103

Script Preparation code:

function makeid() {
  var text = "";
  var possible = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";

  for (var i = 0; i < 5; i++)
    text += possible.charAt(Math.floor(Math.random() * possible.length));

  return text;
}

window.parentObj = {};

for (let i = 0; i < 100; i++) {
	window.parentObj[makeid()] = makeid();
}

Tests:

Object.entries
const newObj = {}; const parentObj = window.parentObj; Object.entries(parentObj).forEach(([k, v], i) => { newObj[k] = v; });
Object.keys
const newObj = {}; const parentObj = window.parentObj; Object.keys(parentObj).forEach((k, i) => { newObj[k] = parentObj[k]; });
Object.entries without array
const newObj = {}; Object.entries(window.parentObj).forEach((keyAndVal, i) => { newObj[keyAndVal[0]] = keyAndVal[1]; });
For in
const newObj = {}; const parentObj = window.parentObj; for (let key in parentObj) { newObj[key] = parentObj[key]; }
For of keys
const newObj = {}; const parentObj = window.parentObj; for (let key of Object.keys(parentObj)) { newObj[key] = parentObj[key]; }
For of entries
const newObj = {}; const parentObj = window.parentObj; for (let kv of Object.entries(parentObj)) { newObj[kv[0]] = kv[1]; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Object.entries
Object.keys
Object.entries without array
For in
For of keys
For of entries

Fastest: N/A

Slowest: N/A

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Latest run results:

Run details: (Test run date: 8 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/107.0.0.0 Safari/537.36

Browser/OS: Chrome 107 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Object.entries	83164.9 Ops/sec
Object.keys	206315.3 Ops/sec
Object.entries without array	85819.7 Ops/sec
For in	184445.3 Ops/sec
For of keys	205639.2 Ops/sec
For of entries	84150.2 Ops/sec

Object.entries VS Object.keys VS Object.keys with extra array VS Object.entries without array 103 (version: 0)

Comparing performance of: Object.entries vs Object.keys vs Object.entries without array vs For in vs For of keys vs For of entries

Created: 10 months ago by: Guest

Jump to the latest result

Object.entries

Object.keys

Object.entries without array

For in

For of keys

For of entries

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A