Run results for: isNaN vs isInteger

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/137.0.0.0 Safari/537.36

Browser: Chrome 137

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: 11 months ago

Test name	Executions per second
isNaN	8.4 Ops/sec
isNumber	6.5 Ops/sec

Script Preparation code:

window.case1 = new Proxy({}, {
  get(t, p, r) {
    if (!Number.isNaN(p)) {
      return +p
    }
    else {
      return Reflect.get(t, p, r)
    }
  }
});
window.case2 = new Proxy({}, {
  get(t, p, r) {
    if (Number.isInteger(p)) {
      return +p
    }
    else {
      return Reflect.get(t, p, r)
    }
  }
});
window.gabage1 = 0;
window.gabage2 = 0;

Tests:

isNaN
for (let i = 0; i < 1e6;i++) { gabage1 =+ case1[i]; }
isNumber
for (let i = 0; i < 1e6;i++) { gabage2 += case2[i]; }

Run results for: isNaN vs isInteger

isNaN

isNumber