MeasureThat.net

Run results for: undefined vs. typeof vs. in vs. hasOwnProperty 222

Object lookup performance

Go to the benchmark
Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:97.0) Gecko/20100101 Firefox/97.0
Firefox 97
Mac OS X 10.14
Desktop
3 years ago
Test name Executions per second
undefined 891027264.0 Ops/sec
typeof 880067904.0 Ops/sec
Script Preparation code:
AخA
 
var obj;
Tests:

  • undefined

     
    undefined !== obj;

  • typeof

     
    'undefined' !== typeof obj;