Run results for: typeof "undefined" versus falsey check

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/106.0.0.0 Safari/537.36

Browser: Chrome 106

Operating system: Linux

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
typeof	4028049.2 Ops/sec
negate	4148664.5 Ops/sec

Script Preparation code:

const undef = undefined
function checkType(val) {
  return typeof val === 'undefined'
}
function negate(val) {
  return !val
}

Tests: