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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser: Chrome 145

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 4 months ago

Test name	Executions per second
Object.assign	212210.9 Ops/sec
For in	486345.5 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: