Run results for: Consume Object.entries vs for..in 2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.146 Safari/537.36

Browser: Chrome 88

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 3 years ago

Test name	Executions per second
Object.entries	2854935.5 Ops/sec
for..in	11402454.0 Ops/sec
Object.keys	2782086.2 Ops/sec
Object.keys no entry	2737938.5 Ops/sec
for..in no array	10712732.0 Ops/sec
Object.entries no array	2582228.0 Ops/sec

Script Preparation code:

var obj = {};
const aCode = 'a'.charCodeAt(0);
const charsQty = 'z'.charCodeAt(0) - aCode;
for (let i = 0; i < charsQty; i += 1) {
    const key0 = String.fromCharCode(aCode + i);
    for (let j = 0; j < charsQty; j += 1) {
        const key1 = key0 + String.fromCharCode(aCode + j);
        for (let k = 0; k < charsQty; k += 1) {
            const key2 = key1 + String.fromCharCode(aCode + k);
            obj[key2] = key2;
        }
    }
}

Tests:

Object.entries
for (let entries = Object.entries(obj), i = entries.length - 1; i >= 0; i--) { console.log(entries[i]) }
for..in
for (let key in obj) { if (obj.hasOwnProperty(key)) { console.log([key, obj[key]]) } }
Object.keys
for (let keyArray = Object.keys(obj), i = keyArray.length - 1, key = keyArray[i]; i >= 0; key = keyArray[--i]) { console.log([key, obj[key]]); }
Object.keys no entry
for (let keyArray = Object.keys(obj), i = keyArray.length - 1, key = keyArray[i]; i >= 0; key = keyArray[--i]) { console.log(key, obj[key]); }
for..in no array
for (let key in obj) { if (obj.hasOwnProperty(key)) { console.log(key, obj[key]) } }
Object.entries no array
for (let entries = Object.entries(obj), i = entries.length - 1, entry = entries[i]; i >= 0; entry = entries[i--]) { console.log(entry[0], entry[1]) }

Run results for: Consume Object.entries vs for..in 2

Object.entries

for..in

Object.keys

Object.keys no entry

for..in no array

Object.entries no array