Benchmark: PRNG functions in plain JavaScript

Script Preparation code:

var a = 1;
var b = 2;
var c = 3;
var d = 4;
var x;



function sfc32(a, b, c, d) {
  return function() {
    a |= 0; b |= 0; c |= 0; d |= 0;
    let t = (a + b | 0) + d | 0;
    d = d + 1 | 0;
    a = b ^ b >>> 9;
    b = c + (c << 3) | 0;
    c = (c << 21 | c >>> 11);
    c = c + t | 0;
    return (t >>> 0) / 4294967296;
  }
}

function splitmix32(a) {
 return function() {
   a |= 0;
   a = a + 0x9e3779b9 | 0;
   let t = a ^ a >>> 16;
   t = Math.imul(t, 0x21f0aaad);
   t = t ^ t >>> 15;
   t = Math.imul(t, 0x735a2d97);
   return ((t = t ^ t >>> 15) >>> 0) / 4294967296;
  }
}

function mulberry32(a) {
  return function() {
    let t = a += 0x6D2B79F5;
    t = Math.imul(t ^ t >>> 15, t | 1);
    t ^= t + Math.imul(t ^ t >>> 7, t | 61);
    return ((t ^ t >>> 14) >>> 0) / 4294967296;
  }
}

function xoshiro128ss(a, b, c, d) {
  return function() {
    let t = b << 9, r = b * 5;
    r = (r << 7 | r >>> 25) * 9;
    c ^= a;
    d ^= b;
    b ^= c;
    a ^= d;
    c ^= t;
    d = d << 11 | d >>> 21;
    return (r >>> 0) / 4294967296;
  }
}

function jsf32(a, b, c, d) {
  return function() {
    a |= 0; b |= 0; c |= 0; d |= 0;
    let t = a - (b << 27 | b >>> 5) | 0;
    a = b ^ (c << 17 | c >>> 15);
    b = c + d | 0;
    c = d + t | 0;
    d = a + t | 0;
    return (d >>> 0) / 4294967296;
  }
}

Tests:

sfc32 (Simple Fast Counter)
x = sfc32(a, b, c, d);
SplitMix32
x = splitmix32(a);
Mulberry32
x = mulberry32(a);
xoshiro128**
x = xoshiro128ss(a, b, c, d);
JSF (Jenkins' Small Fast)
x = jsf32(a, b, c, d);
standart
x = Math.random();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
sfc32 (Simple Fast Counter)
SplitMix32
Mulberry32
xoshiro128**
JSF (Jenkins' Small Fast)
standart

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:129.0) Gecko/20100101 Firefox/129.0

Browser/OS: Firefox 129 on Linux

View result in a separate tab

Test name	Executions per second
sfc32 (Simple Fast Counter)	33707744.0 Ops/sec
SplitMix32	43144828.0 Ops/sec
Mulberry32	42680588.0 Ops/sec
xoshiro128**	33892964.0 Ops/sec
JSF (Jenkins' Small Fast)	35356064.0 Ops/sec
standart	336084704.0 Ops/sec

PRNG functions in plain JavaScript (version: 0)

Comparing performance of: sfc32 (Simple Fast Counter) vs SplitMix32 vs Mulberry32 vs xoshiro128** vs JSF (Jenkins' Small Fast) vs standart

Created: one year ago by: Guest

Jump to the latest result

sfc32 (Simple Fast Counter)

SplitMix32

Mulberry32

xoshiro128**

JSF (Jenkins' Small Fast)

standart

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A