MeasureThat.net

Run results for: Boolean constructor vs double negotiation trick in javascript - with added single negation test

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.3 Safari/605.1.15
Safari 15
Mac OS X 10.15.7
Desktop
3 years ago
Test name Executions per second
Boolean 2188308.8 Ops/sec
Double negation trick 6116225.0 Ops/sec
Single negation 6118390.5 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

  • Single negation

     
    !bFalse
    !sEmpty
    !sFilled
    !nZero
    !nOne