Run results for: parseFloat isNaN vs RegEx parseFloat

Run details:

User agent: 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

Browser: Chrome 109

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 2 years ago

Test name	Executions per second
parseFloat isNaN	3132341.8 Ops/sec
RegEx parseFloat	2932003.5 Ops/sec

Script Preparation code:

var n = "-5";
var regex = /^-?\d+$/;

AخA
 
var n = "-5";var regex = /^-?\d+$/;

Tests:

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