Run results for: Object.entries vs for-in loop

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:143.0) Gecko/20100101 Firefox/143.0

Browser: Firefox 143

Operating system: Linux

Device Platform: Desktop

Date tested: 11 months ago

Benchmark engine: Benchmark.js

object entries

33K/s

for in

31K/s

View exact numbers

Test name	Executions per second
✓ object entries	32,774 Ops/sec
for in	30,588 Ops/sec

Script Preparation code:

var obj = {
	a: 1,
    b: 2,
	c: 3,
	d: 4,
	0: 'a',
  	1: 'b'
};

Tests:

object entries
for(const [key, value] of Object.entries(obj)){ console.log(key, value); }
for in
for(const key in obj){ console.log(key, obj[key]); }