Run results for: reduce (immutable) vs map + fromEntries

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/150.0.0.0 Safari/537.36

Browser: Chrome 150

Operating system: Windows

Device Platform: Desktop

Date tested: 17 days ago

map + fromEntries

598/s

reduce

38/s

View exact numbers

Test name	Executions per second
✓ map + fromEntries	598 Ops/sec
reduce	38 Ops/sec

Script Preparation code:

var data = { ...Array.from(Array(10000).keys()) };

Tests:

reduce
Object.entries(data).reduce((acc, [k, v]) => ({ ...acc, [k]: v.toString() }), {});
map + fromEntries
Object.fromEntries(Object.entries(data).map(([k, v]) => ([k, v.toString()])));