MeasureThat.net

Run results for: var1!==null vs var1!==undefined vs var1!=="x"

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Run details:
Mozilla/5.0 (iPad; CPU OS 14_8 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/96.0.4664.53 Mobile/15E148 Safari/604.1
Chrome Mobile iOS 96
iOS 14.8
Tablet
3 years ago
Test name Executions per second
var1!==null 14991078.0 Ops/sec
var1!==undefined 5243597.0 Ops/sec
var1!=="x" 15088138.0 Ops/sec
Script Preparation code:
AخA
 
var var1;
Tests:

  • var1!==null

     
    if(var1!==null);

  • var1!==undefined

     
    if(var1!==undefined);

  • var1!=="x"

     
    if(var1!=="x");