Run details:
Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Mobile Safari/537.36
Chrome Mobile 129
Android
Mobile
4 months ago
Test name Executions per second
typeof string is undefined 26955936.0 Ops/sec
typeof undefined is undefined 1108489.4 Ops/sec
string is undefined 698358.0 Ops/sec
undefined is undefined 357209.0 Ops/sec
Tests:
  • typeof string is undefined

    AخA
     
    typeof "not undefined" === "undefined"
  • typeof undefined is undefined

     
    typeof undefined === "undefined"
  • string is undefined

     
    "not undefined" === undefined
  • undefined is undefined

     
    undefined === undefined