Run results for: Creating Uids v2

Run details:

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/129.0.0.0 Safari/537.36

Browser: Chrome 129

Operating system: Mac OS X 10.15.7

Device Platform: Desktop

Date tested: one year ago

Simple UID with variable length

29.4M/s

Simple Uid

1.9M/s

Variable length uid

368K/s

UUID4

351K/s

View exact numbers

Test name	Executions per second
✓ Simple UID with variable length	29,353,132 Ops/sec
Simple Uid	1,939,726 Ops/sec
Variable length uid	368,353 Ops/sec
UUID4	350,546 Ops/sec

Script Preparation code:


  function simpleUid() {
        return Math.random().toString(36).substring(2, 15) + Math.random().toString(36).substring(2, 15);
    }
    
  function uuid4() {
        return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
            let r = Math.random() * 16 | 0;
            let v = c === 'x' ? r : (r & 0x3 | 0x8);
            return v.toString(16);
        });
    }

function generateUniqueId(length) {
    let result = '';
    const characters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
    const charactersLength = characters.length;

    for (let i = 0; i < length; i++) {
        result += characters.charAt(Math.floor(Math.random() * charactersLength));
    }

    return result;
}

function simpleUidL(length) {
    let result = '';
    while (result.length < length) {
        result += Math.random().toString(36).substring(2, 15);
    }
    return result.substring(0, length);
}

Tests:

Simple Uid
let uid = simpleUid();
UUID4
let uid = uuid4();
Variable length uid
let uid = generateUniqueId(21);
Simple UID with variable length
let uid = simpleUidL();

Run results for: Creating Uids v2

Create different types of UID

Simple Uid

UUID4

Variable length uid

Simple UID with variable length