Run results for: Random string 3

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.0.1 Safari/605.1.15

Browser: Safari 18

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

crypto.randomUUID()

7.6M/s

generate

4.2M/s

View exact numbers

Test name	Executions per second
✓ crypto.randomUUID()	7,554,817 Ops/sec
generate	4,241,518 Ops/sec

HTML Preparation code:

<!--your preparation HTML code goes here-->

Script Preparation code:

var registeredIds = new Set();
function generate() {
    let id = Math.random();
    while(this.registeredIds.has(id)) {
      id = Math.random();
    }

    registeredIds.add(id);
    return id;
}

Tests:

generate
generate(10)
crypto.randomUUID()
crypto.randomUUID()