Run results for: entries vs for vs foreach vs some vs every length

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36 Edg/115.0.1901.188

Browser: Chrome 115

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
entries	382486.5 Ops/sec
for	30506.1 Ops/sec
foreach	542238.2 Ops/sec
some	562642.5 Ops/sec
every	553186.7 Ops/sec
for-length	84313.0 Ops/sec

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.parentArr = [];

for (let i = 0; i < 100; i++) {
	window.parentArr.push(makeid());
}

Tests:

entries
const newObj = {}; for (const [i, v] of window.parentArr.entries()) { if ((i % 2) === 0) { newObj[i] = v; } }
for
const newObj = {}; for (let i = 0; i < window.parentArr.length; i++) { if ((i % 2) === 0) { newObj[i] = window.parentArr[i]; } }
foreach
const newObj = {}; window.parentArr.forEach((v, i) => { if ((i % 2) === 0) { newObj[i] = v; } })
some
const newObj = {}; window.parentArr.some((v, i) => { if ((i % 2) === 0) { newObj[i] = v; } return false; })
every
const newObj = {}; window.parentArr.every((v, i) => { if ((i % 2) === 0) { newObj[i] = v; } return true; })
for-length
const newObj = {}; for (let i = 0, length = window.parentArr.length; i < length; i++) { if ((i % 2) === 0) { newObj[i] = window.parentArr[i]; } }

Run results for: entries vs for vs foreach vs some vs every length

entries

for

foreach

some

every

for-length