Run results for: typeof x === 'number' vs isNaN(x) F302

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Script Preparation code:

var myNum = Math.random();
var myString = Math.round(Math.random()*999+888).toString(16);
var isNaNx = Number.isNaN;

Tests:

isNaNx
let u = 0; if(isNaNx(myNum))u++; if(isNaNx(myString))u++; if(isNaNx(myNum))u++; if(isNaNx(myString))u++;
isNaN
let u = 0; if(isNaN(myNum))u++; if(isNaN(myString))u++; if(isNaN(myNum))u++; if(isNaN(myString))u++;
isNaN2
let u = 0; const p = (isNaN(myNum) ? 1 : 0) + (isNaN(myString) ? 2 : 0); if(p&1)u++; if(p&2)u++; if(p&1)u++; if(p&2)u++;
isNaNx2
let u = 0; const p = (isNaNx(myNum) ? 1 : 0) + (isNaNx(myString) ? 2 : 0); if(p&1)u++; if(p&2)u++; if(p&1)u++; if(p&2)u++;