Run results for: For in vs Object.entries Check

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Browser: Chrome 120

Operating system: Windows

Device Platform: Desktop

Date tested: 2 years ago

Benchmark engine: Benchmark.js

Object.entries

21/s

For in

21/s

View exact numbers

Test name	Executions per second
✓ Object.entries	21 Ops/sec
For in	21 Ops/sec

Script Preparation code:

var obj = {}
for(i=0; i<10000; i++){
  obj['key_'+i] = Math.random();
}

Tests:

For in
for(let key in obj){ if(obj[key]){ console.log(`${key}: ${obj[key]}`); } }
Object.entries
for (const [key, value] of Object.entries(obj)) { console.log(`${key}: ${value}`); }