Run results for: isNull function vs pure

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36 Edg/85.0.564.51

Browser: Chrome 85

Operating system: Windows

Device Platform: Desktop

Date tested: 3 years ago

Script Preparation code:

function isNull(anObj) {
  return anObj == null;
}
var aStr = "asdfljbsflaskdnflkbsadf";

Tests: