Run results for: [key, value] of Object.entries vs for..in

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/16.4 Safari/605.1.15

Browser: Safari 16

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
[key, value] of Object.entries(obj)	13.0 Ops/sec
key in ob	13.4 Ops/sec
for i Object.entries	12.7 Ops/sec

Script Preparation code:

var obj = {
	a: 1,
    b: 2,
	c: 3,
	d: 4,
	0: 'a',
  	1: 'b',
  	str: 'long string',
	nested: {
    	nested: 0
    },
	hello: 55.5
};

Tests:

[key, value] of Object.entries(obj)
for (let i = 0; i < 10000; i++) { for (const [key, value] of Object.entries(obj)) { console.log(key, value); } }
key in ob
for (let i = 0; i < 10000; i++) { for (const key in obj) { const value = obj[key]; console.log(key, value); } }
for i Object.entries
for (let i = 0; i < 10000; i++) { for (let entries = Object.entries(obj), i = entries.length - 1, entry = entries[i]; i >= 0; entry = entries[i--]) { const [key, value] = entry; console.log(key, value); } }