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

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/78.0.3904.108 Safari/537.36

Browser: Chrome 78

Operating system: Mac OS X 10.13.6

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
typeof	13067270.0 Ops/sec
constructor	3331376.0 Ops/sec

Script Preparation code:

var fun = a => {};

Tests: