Run results for: JS instanceof vs in

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:146.0) Gecko/20100101 Firefox/146.0

Browser: Firefox 146

Operating system: Windows

Device Platform: Desktop

Date tested: 8 months ago

3855.1M/s

instanceof

345.9M/s

View exact numbers

Test name	Executions per second
✓ in	3,855,095,808 Ops/sec
instanceof	345,943,008 Ops/sec

Script Preparation code:

var obj = {a:2};

Tests: