Benchmark Run Result for: Array of key values - Object.entries VS Object.keys

Array of key values - Object.entries VS Object.keys

Date tested: 2 years ago

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0

Test name	Executions per second
Object.entries	128656.1 Ops/sec
Object.keys	51759.2 Ops/sec

Benchmark definition (click to collapse):

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
Object.entries(window.parentObj).map(([id, name]) => { return {id, name} });
Object.keys
Object.keys(window.parentObj).map(id => { const name = window.parentObj[id]; return { id, name }; });

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