Run results for: Object.assign vs for...in...

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:147.0) Gecko/20100101 Firefox/147.0

Browser: Firefox 147

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: 5 months ago

For in

1.6M/s

Object.assign

1.5M/s

View exact numbers

Test name	Executions per second
✓ For in	1,648,772 Ops/sec
Object.assign	1,493,210 Ops/sec

Script Preparation code:

var target = {};
var obj = {};

for (var i = 0; i < 100; i++) {
	obj['propp'+i] = ('this is a value ' + i);
}

Tests: