Run results for: key in object vs object.key

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:135.0) Gecko/20100101 Firefox/135.0

Browser: Firefox 135

Operating system: Mac OS X 10.15

Device Platform: Desktop

Date tested: one year ago

key in object

814.5M/s

object.key

814.1M/s

View exact numbers

Test name	Executions per second
✓ key in object	814,529,472 Ops/sec
object.key	814,109,952 Ops/sec

Script Preparation code:

var key = 'hello';
var value = 'world';
var object = {[key]: value};

Tests: