Run results for: UUID Implentations vs crypto

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser: Chrome 136

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Tests:

crypto
const uuid = crypto.randomUUID(); return uuid;
regex v1
let d = Date.now(); if ( typeof performance !== 'undefined' && typeof performance.now === 'function' ) { d += performance.now(); // use high-precision timer if available } const uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function (c) { const r = (d + Math.random() * 16) % 16 | 0; d = Math.floor(d / 16); return (c === 'x' ? r : (r & 0x3) | 0x8).toString(16); }); return uuid;
regex v2
const uuid = () => [...Array(4)].map(() => Math.floor(Math.random() * Number.MAX_SAFE_INTEGER).toString(16)).join('-'); return uuid;
regex v3
const uuid = "10000000-1000-4000-8000-100000000000".replace(/[018]/g, c => (+c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> +c / 4).toString(16) ); return uuid;
regex v4
let d = new Date().getTime(), d2 = ((typeof performance !== 'undefined') && performance.now && (performance.now() * 1000)) || 0; const uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, c => { let r = Math.random() * 16; if (d > 0) { r = (d + r) % 16 | 0; d = Math.floor(d / 16); } else { r = (d2 + r) % 16 | 0; d2 = Math.floor(d2 / 16); } return (c == 'x' ? r : (r & 0x7 | 0x8)).toString(16); }); return uuid;