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

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/141.0.0.0 Safari/537.36

Browser: Chrome 141

Operating system: Linux

Device Platform: Desktop

Date tested: 11 months ago

Benchmark engine: Benchmark.js

for in

30K/s

object entries

27K/s

View exact numbers

Test name	Executions per second
✓ for in	29,998 Ops/sec
object entries	26,573 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]); }