Run results for: ID Generation Testing

Test name	Executions per second
✓ splitmix32	10,523,655 Ops/sec
Java	10,363,147 Ops/sec
djb2	10,262,909 Ops/sec
cyrb53a_beta2	6,433,020 Ops/sec
cyrb53_beta1	5,953,420 Ops/sec
cyrb53	5,591,142 Ops/sec
Blaze	5,039,722 Ops/sec
crypto	3,606,780 Ops/sec
Script Preparation code:
function BlazeHash() {
    let key = String(performance.now()), seed = 0, keyLength = 6;
    let h1 = 0xcafebabe ^ seed, h2 = 0xdeadbeef ^ seed, i = 0;
    for(let b = keyLength & -8; i < b; i += 8) {
        h1 ^= key[i+3] << 24 | key[i+2] << 16 | key[i+1] << 8 | key[i  ];
        h2 ^= key[i+7] << 24 | key[i+6] << 16 | key[i+5] << 8 | key[i+4];
        h1 ^= Math.imul(h2 ^ (h2 >>> 15), 0xca9b4735);
        h2 ^= Math.imul(h1 ^ (h1 >>> 16), 0x38b34ae5);
    }
    switch(keyLength & 7) {
        case 7: h2 ^= key[i+6] << 16;
        case 6: h2 ^= key[i+5] << 8;
        case 5: h2 ^= key[i+4];
        case 4: h1 ^= key[i+3] << 24;
        case 3: h1 ^= key[i+2] << 16;
        case 2: h1 ^= key[i+1] << 8;
        case 1: h1 ^= key[i];
        h1 ^= Math.imul(h2 ^ (h2 >>> 15), 0xca9b4735);
        h2 ^= Math.imul(h1 ^ (h1 >>> 16), 0x38b34ae5);
    }
    h1 ^= keyLength ^ h2;
    h1 ^= Math.imul(h1 ^ (h2 >>> 15), 0x735a2d97);
    h2 ^= Math.imul(h2 ^ (h1 >>> 15), 0xcaf649a9);
    h1 ^= h2 >>> 16; h2 ^= h1 >>> 16;
    return [h1 >>> 0, h2 >>> 0];
    //return 2097152 * (h2 >>> 0) + (h1 >>> 11);
}

function javaStringHash() {
    let key = String(performance.now()), keyLength = 6;
    var hash = 0;
    for (var i = 0; i < keyLength; i++) {
        hash = ((hash << 5) - hash) + key.charCodeAt(i);
        hash |= 0; // Convert to 32bit integer
    }
    return hash;
}

function djb2() {
    let key = String(performance.now()), keyLength = 6, hash = 5381;
    for (var i = 0; i < keyLength; i++) {
        hash = ((hash << 5) + hash) + key.charCodeAt(i);
        hash |= 0; // Convert to 32bit integer
    }
    return hash;
}


function cyrb53() {
    let key = String(performance.now()), seed = 0, keyLength = 6;
    var h1 = 0xdeadbeef ^ seed, h2 = 0x41c6ce57 ^ seed;
  
    for (var i = 0; i < keyLength; i++) {
        var ch = key.charCodeAt(i);
        h1 = Math.imul(h1 ^ ch, 2654435761);
        h2 = Math.imul(h2 ^ ch, 1597334677);
    }

    h1 = Math.imul(h1 ^ (h1 >>> 16), 2246822507) ^ Math.imul(h2 ^ (h2 >>> 13), 3266489909);
    h2 = Math.imul(h2 ^ (h2 >>> 16), 2246822507) ^ Math.imul(h1 ^ (h1 >>> 13), 3266489909);

    return 4294967296 * (2097151 & h2) + (h1 >>> 0);
};


const cyrb53_beta1 = function() {
  let key = String(performance.now()), seed = 0, keyLength = 6;
  let h1 = 0xdeadbeef ^ seed, h2 = 0x41c6ce57 ^ seed;
  for(let i = 0, ch; i < keyLength; i++) {
    ch = key.charCodeAt(i);
    h1 = Math.imul(h1 ^ ch, 2654435761);
    h2 = Math.imul(h2 ^ ch, 1597334677);
  }
  h1  = Math.imul(h1 ^ (h1 >>> 16), 2246822507);
  h1 ^= Math.imul(h2 ^ (h2 >>> 13), 3266489909);
  h2  = Math.imul(h2 ^ (h2 >>> 16), 2246822507);
  h2 ^= Math.imul(h1 ^ (h1 >>> 13), 3266489909);
  return 4294967296 * (2097151 & h2) + (h1 >>> 0);
};

/*
    cyrb53a beta (c) 2023 bryc (github.com/bryc)
    License: Public domain (or MIT if needed). Attribution appreciated.
    This is a work-in-progress, and changes to the algorithm are expected.
    The original cyrb53 has a slight mixing bias in the low bits of h1.
    This doesn't affect collision rate, but I want to try to improve it.
    This new version has preliminary improvements in avalanche behavior.
*/
const cyrb53a_beta2 = function() {
  let key = String(performance.now()), seed = 0, keyLength = 6;
  let h1 = 0xdeadbeef ^ seed, h2 = 0x41c6ce57 ^ seed;
  for(let i = 0, ch; i < keyLength; i++) {
    ch = key.charCodeAt(i);
    h1 = Math.imul(h1 ^ ch, 0x85ebca77);
    h2 = Math.imul(h2 ^ ch, 0xc2b2ae3d);
  }
  h1 ^= Math.imul(h1 ^ (h2 >>> 15), 0x735a2d97);
  h2 ^= Math.imul(h2 ^ (h1 >>> 15), 0xcaf649a9);
  h1 ^= h2 >>> 16; h2 ^= h1 >>> 16;
    return 2097152 * (h2 >>> 0) + (h1 >>> 11);
};

function splitmix32() {
      let a = performance.now()
      a |= 0; a = a + 0x9e3779b9 | 0;
      var 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 MurmurHash1() {
  let key = String(performance.now()), seed = 0, keyLength = 6, m = 3332679571, h = Math.imul(key.length, m) ^ seed;

    for(var i = 0, b = keyLength & -4; i < b; i += 4) {
        h += key[i+3] << 24 | key[i+2] << 16 | key[i+1] << 8 | key[i];
        h = Math.imul(h, m); h ^= h >>> 16;
    }

    switch(keyLength & 3) {
        case 3: h += key[i+2] << 16;
        case 2: h += key[i+1] << 8;
        case 1: h += key[i];
                h = Math.imul(h, m); h ^= h >>> 16;
    }

    h = Math.imul(h, m); h ^= h >>> 10;
    h = Math.imul(h, m); h ^= h >>> 17;

    return h >>> 0;
};
Run results for: ID Generation Testing

Blaze

Java

djb2

cyrb53

cyrb53_beta1

cyrb53a_beta2

crypto

splitmix32

MurmurHash1
