Run results for: Hashing stuff 2

Test name	Executions per second
✓ cyrb53	105,265 Ops/sec
hashSum	28,954 Ops/sec
Script Preparation code:
var cfg = {
    "car": "resources/cars/141003",
    "color": "#AB2567",
    "angle": 6,
    "rims": "resources/rims/NISSAN_SUV2_kicks_2021_18_1500",
    "tyres": "resources/tyres/T4_18_1500",
    "tint": 25,
    "shadow": true,
    "height": 0,
    "plate": "",
    "background": "",
    "plateFilterQuality": 0,
    "partSelectionEnabled": true,
    "soloPart": "",
    "soloMode": "ghost"
}


function pad (hash, len) {
  while (hash.length < len) {
    hash = '0' + hash;
  }
  return hash;
}

function fold (hash, text) {
  var i;
  var chr;
  var len;
  if (text.length === 0) {
    return hash;
  }
  for (i = 0, len = text.length; i < len; i++) {
    chr = text.charCodeAt(i);
    hash = ((hash << 5) - hash) + chr;
    hash |= 0;
  }
  return hash < 0 ? hash * -2 : hash;
}

function foldObject (hash, o, seen) {
  return Object.keys(o).sort().reduce(foldKey, hash);
  function foldKey (hash, key) {
    return foldValue(hash, o[key], key, seen);
  }
}

function foldValue (input, value, key, seen) {
  var hash = fold(fold(fold(input, key), toString(value)), typeof value);
  if (value === null) {
    return fold(hash, 'null');
  }
  if (value === undefined) {
    return fold(hash, 'undefined');
  }
  if (typeof value === 'object' || typeof value === 'function') {
    if (seen.indexOf(value) !== -1) {
      return fold(hash, '[Circular]' + key);
    }
    seen.push(value);

    var objHash = foldObject(hash, value, seen)

    if (!('valueOf' in value) || typeof value.valueOf !== 'function') {
      return objHash;
    }

    try {
      return fold(objHash, String(value.valueOf()))
    } catch (err) {
      return fold(objHash, '[valueOf exception]' + (err.stack || err.message))
    }
  }
  return fold(hash, value.toString());
}

function toString (o) {
  return Object.prototype.toString.call(o);
}

function sum (o) {
  return pad(foldValue(0, o, '', []).toString(16), 8);
}


function cyrb53(str, seed = 0) {
  let h1 = 0xdeadbeef ^ seed,
    h2 = 0x41c6ce57 ^ seed;
  for (let i = 0, ch; i < str.length; i++) {
    ch = str.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);
};
Run results for: Hashing stuff 2

Testing some hashing

hashSum

cyrb53
