Run results for: Check function. typeof vs constructor + null check

Run details:

User agent: Mozilla/5.0 (Linux; Android 9; MI 8) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/76.0.3809.89 Mobile Safari/537.36

Browser: Chrome Mobile 76

Operating system: Android

Device Platform: Mobile

Date tested: 4 years ago

Test name	Executions per second
typeof	6914359.0 Ops/sec
constructor	1833270.0 Ops/sec

Script Preparation code:

var fun = a => {};

Tests: