Run results for: JS instanceof vs in

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36 Edg/136.0.0.0

Browser: Chrome 136

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

instanceof

232.2M/s

217.4M/s

View exact numbers

Test name	Executions per second
✓ instanceof	232,209,920 Ops/sec
in	217,401,488 Ops/sec

Script Preparation code:

var obj = {a:2};

Tests: