Run results for: falsy vs typeof

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:67.0) Gecko/20100101 Firefox/67.0

Browser: Firefox 67

Operating system: Linux

Device Platform: Desktop

Date tested: 4 years ago

Test name	Executions per second
falsy	295129300.0 Ops/sec
typeof	93010.2 Ops/sec

Script Preparation code:

let a = null
let b = null

Tests:

falsy
let a = undefined let b = null if (a) console.log('-') if (b) console.log('-')
typeof
let a = undefined let b = null if (typeof a === 'undefined') console.log('-') if (typeof b === 'undefined') console.log('-')