Benchmark: Math.random() vs. random() v2

Script Preparation code:

var random = (() => {
    const MAX = 2 ** 32 - 1;
    const pool = crypto.getRandomValues(new Uint32Array(1024)); // 4MB
    let index = 0;

    return () => {
        const value = pool[index];
        index++;
        if (index === pool.length) {
            crypto.getRandomValues(pool);
            index = 0;
        }
        return value / MAX;
    };
})();

Tests:

Math.random()
Math.random()
random()
random()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Math.random()
random()

Fastest: N/A

Slowest: N/A

ⓘ Get performance results from real users on your website with Request Metrics.

Website Performance Monitoring by Request Metrics

Latest run results:

Run details: (Test run date: 19 days ago)

User agent: Mozilla/5.0 (Windows NT 5.1; rv:52.0) Gecko/20100101 Firefox/52.0

Browser/OS: Firefox 52 on Windows XP

View result in a separate tab

Test name	Executions per second
Math.random()	185686600.0 Ops/sec
random()	10589470.0 Ops/sec

Math.random() vs. random() v2 (version: 0)

Comparing performance of: Math.random() vs random()

Created: one month ago by: Guest

Jump to the latest result

Math.random()

random()

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A