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Run results for: parseFloat isNaN vs RegEx parseFloat vs Number isNaN

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Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36
Chrome 109
Mac OS X 10.15.7
Desktop
2 years ago
Test name Executions per second
parseFloat isNaN 3110600.0 Ops/sec
RegEx parseFloat 2911099.8 Ops/sec
Number isNaN 3223382.2 Ops/sec
Script Preparation code:
AخA
 
var n = "-5";
var regex = /^-?\d+$/;
Tests:

  • parseFloat isNaN

     
    var v = parseFloat(n);
    var a = isNaN(v) ? n : v;

  • RegEx parseFloat

     
    var a = regex.test(n) ? parseFloat(n) : n;

  • Number isNaN

     
    var v = Number(n);
    var a = isNaN(v) ? n : v;