Run results for: Object for of vs reduce

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

for of

2.1M/s

reduce

1.0M/s

View exact numbers

Test name	Executions per second
✓ for of	2,139,885 Ops/sec
reduce	1,022,708 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var headers = {
  Authorization: 'test',
};

Tests:

for of
const headersCleaned = {} for (const [key, value] of Object.entries(headers)) { headersCleaned[key.toLocaleLowerCase()] = value; }
reduce
const headersCleaned = Object.entries(headers).reduce( (acc, [key, value]) => ({ ...acc, [key.toLowerCase()]: value }), {} );