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

Script Preparation code:

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() / 4294967296
}

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

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Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser/OS: Chrome 128 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Math.random()	13834830.0 Ops/sec
random()	22663520.0 Ops/sec

Math.random() vs. random() (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