Run results for: Generate random string

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser: Chrome 128

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Test name	Executions per second
✓ Test gen2	3,494,087 Ops/sec
Test gen1	2,377,419 Ops/sec

Script Preparation code:

function gen1() {
    return Math.random().toString(36).slice(2)
}

class EntropyPool {
    #entropy;
    #index
    constructor(poolSize = 1024) {
        this.#entropy = new Uint32Array(poolSize)
        this.#index = 0
        crypto.getRandomValues(this.#entropy)
    }
    next() {
        const value = this.#entropy[this.#index++]
        if (this.#index === this.#entropy.length) {
            crypto.getRandomValues(this.#entropy)
            this.#index = 0
        }
        return value
    }
}

const pool = new EntropyPool()

function random() {
    return pool.next() / 4294967295
}

const lowercase = 'abcdefghijklmnopqrstuvwxyz';
const uppercase = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ';
const digits = '0123456789';
const charset = `${lowercase}${uppercase}${digits}`;

function gen2() {
    let result = '';
    for (let i = 0; i < length; i++) {
        const id = randomInt([0, charset.length - 1]);
        result += charset[id];
    }
    return result;
}

Run results for: Generate random string

Test gen1

Test gen2