Run results for: key in object vs object.key

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/135.0.0.0 Safari/537.36 Edg/135.0.0.0

Browser: Chrome 135

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

object.key

216.1M/s

key in object

194.6M/s

View exact numbers

Test name	Executions per second
✓ object.key	216,111,216 Ops/sec
key in object	194,556,048 Ops/sec

Script Preparation code:

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

Tests: