Benchmark: UUID Generator - MeasureThat.net

Tests:

With web crypto
function getUUID() { return ([1e7] + -1e3 + -4e3 + -8e3 + -1e11).replace(/[018]/g, (c) => (c ^ (crypto.getRandomValues(new Uint8Array(1))[0] & (15 >> (c / 4)))).toString(16), ); } getUUID()
Math.random
function getUUID() { return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) { var r = Math.random() * 16 | 0, v = c == 'x' ? r : (r & 0x3 | 0x8); return v.toString(16); }); } getUUID()

Rendered benchmark preparation results:

Previous results

Test case name	Result
With web crypto
Math.random

Latest run results:

Run details: (Test run date: one year ago)

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/OS: Chrome 136 on Mac OS X 10.15.7

Math.random

929K/s

With web crypto

5K/s

View exact numbers

Test name	Executions per second
✓ Math.random	929,008 Ops/sec
With web crypto	4,577 Ops/sec

UUID Generator (version: 0) Benchmark.js