MeasureThat.net

Run results for: Boolean constructor vs double negotiation trick in javascript

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Run details:
Mozilla/5.0 (iPad; CPU OS 17_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/116.0.5845.177 Mobile/15E148 Safari/604.1
Chrome Mobile iOS 116
iOS 17.0
Tablet
6 months ago
Test name Executions per second
Boolean 1401275.8 Ops/sec
Double negation trick 3526146.2 Ops/sec
Script Preparation code:
AخA
 
var bFalse = false;
var sEmpty = '';
var sFilled = 'Foo';
var nZero = 0;
var nOne = 1;
Tests:

  • Boolean

     
    Boolean(bFalse)
    Boolean(sEmpty)
    Boolean(sFilled)
    Boolean(nZero)
    Boolean(nOne)

  • Double negation trick

     
    !!bFalse
    !!sEmpty
    !!sFilled
    !!nZero
    !!nOne