Boolean constructor vs double negotiation trick in javascript
Date tested:
5 years ago
User agent:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:73.0) Gecko/20100101 Firefox/73.0
Test name
Executions per second
Boolean
20160880.0 Ops/sec
Double negation trick
58353688.0 Ops/sec
Benchmark definition (click to collapse):
Script Preparation code:
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
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