Run results for: regex vs isInteger

Run details:

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:139.0) Gecko/20100101 Firefox/139.0

Browser: Firefox 139

Operating system: Linux

Device Platform: Desktop

Date tested: 10 months ago

Test name	Executions per second
isInteger	31.6 Ops/sec
regex	24.4 Ops/sec

Script Preparation code:

window.case1 = new Proxy({}, {
  get(t, p, r) {
    if (Number.isInteger(p)) {
      return +p
    }
    else {
      return Reflect.get(t, p, r)
    }
  }
});
window.case2 = new Proxy({}, {
  get(t, p, r) {
    if (/^\d+$/.test(p)) {
      return +p
    }
    else {
      return Reflect.get(t, p, r)
    }
  }
});
window.garbage1 = 0;
window.garbage2 = 0;

Tests:

isInteger
for (let i = 0; i < 1e6;i++) { garbage1 =+ case1[i]; }
regex
for (let i = 0; i < 1e6;i++) { garbage2 += case2[i]; }