Run details:
Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36
Chrome 125
Linux
Desktop
4 months ago
Test name Executions per second
typeof string is undefined 66193784.0 Ops/sec
typeof undefined is undefined 4820586.0 Ops/sec
string is undefined 4682438.5 Ops/sec
undefined is undefined 2455148.8 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