Run results for: Object.assign vs for...in... (2)

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0

Browser: Firefox 129

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Object.assign

3.0M/s

For in

519K/s

View exact numbers

Test name	Executions per second
✓ Object.assign	3,012,486 Ops/sec
For in	519,272 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: