Benchmark: deep clone (bigger obj2)

Script Preparation code:

var obj = {
  lcGsJoyg: 923,
  rnyCpgBp: 0.14232913002745584,
  fRdJYycV: false,
  MhcXxAvs: 823,
  xsgPPMlh: null,
  random: {
  lcGsJoyg: 923,
  rnyCpgBp: 0.14232913002745584,
  fRdJYycV: false,
  MhcXxAvs: 823,
  xsgPPMlh: null,
  oiwmefHG: {
    UTUgyyYu: 0.8460004792043192,
    rFHXPYqw: null,
    eritVMnr: 0.21718792648430552,
    CmdVUytQ: {
      gPzaloRj: {
        vJGXVxJi: 724,
        GWoNVYgR: 'MtZHJ',
        NKYagqQy: null,
        dcENxKZF: 0.6580619745895702,
        wkcrUxzQ: 525,
        wdgfWxAt: {
          NWusGqvV: null,
          ocDTnuzA: {
            ireyJyPa: null,
            yBfgBsBF: true,
            ztkStRQt: 521,
            vIPrhOdP: {
              griUwbgI: 0.6655577562406807,
              lwnOKkjn: 'cQkIJ',
              QZZcwLJS: null,
              YHoBGUqM: 'UhtGd',
              iqcWrKdY: 0.20044669952640715,
              gJDPdldk: false,
              tDIfUrRm: 'AmJa'
            },
            oajJQWPh: null,
            WNQzSlkO: 339,
            XctovUMs: {
              IMRZWJAL: 'imAem',
              SRZpRAES: 0.6581839734263002,
              nstaegiO: 'IAUTA',
              HXXWFiKI: 0.7565237544343479,
              OFtsaIuQ: null,
              HdVqUINd: true,
              cxYtCXsC: null
            }
          },
          SjApjcJj: 0.41979165756875614,
          epIaqVXi: {
            oQwVxhtd: 0.48392401230685933,
            QDLIBEAH: 531,
            QwFecXMq: 0.09580261444084126,
            ZqdFSMfh: 'FIVHVE',
            AmKQZPtn: 0.4691995901700068,
            WAOnvuAW: 0.22911279743355517,
            cTroNQCg: {
              LtiZLnfc: true,
              QnQqXLCx: true,
              RwSeFGNT: 0.7892606890112777,
              acfSFjSC: 'nLKw',
              vkzyiybF: 762,
              mbHcTjTk: true,
              lpTXhJIu: 0.9044203649447724
            }
          },
          uszorzIa: 683,
          ZSXKrZcK: 589,
          EPIBxpda: false
        },
        TAhWdyQI: {
          GmGlwadX: 0.07260820123948841,
          oUrEBIxh: false,
          QQVrfBgx: 'zHtTjJl',
          XVpvGtON: null,
          JpeRxiVu: 0.007310863658203104,
          rRaPAAoo: {
            XdyWuVLQ: 0.6644858232080231,
            jbNiHRoN: 979,
            UIzfbBVY: 'tgWe',
            RRBKfPBv: 0.4678891584339877,
            jkrRfnxD: 'ApqoGpi',
            tqbqMHjc: null,
            XNwMjMqz: false
          },
          TWbSfQSL: 553
        }
      },
      bARzFicd: 371,
      voGDXchb: 0.404082207305148,
      czhHunfI: {
        PNJUgweg: true,
        aptcXaHr: 'ViLM',
        JCOHjPKW: 'LOnDG',
        EpSluekD: 'MNdzqj',
        kjzxbbtE: {
          gQRwBOFC: 26,
          zTHKGxpC: 'xMqaFQT',
          osxNVvGn: 0.9200386158505891,
          rhMbCUUz: 0.456411419439837,
          JLaOrbrA: 719,
          ONXnVuIH: 'FEzyY',
          KEPnDRhp: null
        },
        gFOGssAr: true,
        YDoztSAx: false
      },
      ncipQKiE: false,
      ORqLDzrJ: 678,
      VKbCMPyO: false
    },
    LvesAdJX: false,
    MFRoToDJ: 377,
    sTaUMrMG: 'JEFnUl'
  },
  PnRWMDwh: 'BphBF'
},
  oiwmefHG: {
    UTUgyyYu: 0.8460004792043192,
    rFHXPYqw: null,
    eritVMnr: 0.21718792648430552,
    CmdVUytQ: {
      gPzaloRj: {
        vJGXVxJi: 724,
        GWoNVYgR: 'MtZHJ',
        NKYagqQy: null,
        dcENxKZF: 0.6580619745895702,
        wkcrUxzQ: 525,
        wdgfWxAt: {
          NWusGqvV: null,
          ocDTnuzA: {
            ireyJyPa: null,
            yBfgBsBF: true,
            ztkStRQt: 521,
            vIPrhOdP: {
              griUwbgI: 0.6655577562406807,
              lwnOKkjn: 'cQkIJ',
              QZZcwLJS: null,
              YHoBGUqM: 'UhtGd',
              iqcWrKdY: 0.20044669952640715,
              gJDPdldk: false,
              tDIfUrRm: 'AmJa'
            },
            oajJQWPh: null,
            WNQzSlkO: 339,
            XctovUMs: {
              IMRZWJAL: 'imAem',
              SRZpRAES: 0.6581839734263002,
              nstaegiO: 'IAUTA',
              HXXWFiKI: 0.7565237544343479,
              OFtsaIuQ: null,
              HdVqUINd: true,
              cxYtCXsC: null
            }
          },
          SjApjcJj: 0.41979165756875614,
          epIaqVXi: {
            oQwVxhtd: 0.48392401230685933,
            QDLIBEAH: 531,
            QwFecXMq: 0.09580261444084126,
            ZqdFSMfh: 'FIVHVE',
            AmKQZPtn: 0.4691995901700068,
            WAOnvuAW: 0.22911279743355517,
            cTroNQCg: {
              LtiZLnfc: true,
              QnQqXLCx: true,
              RwSeFGNT: 0.7892606890112777,
              acfSFjSC: 'nLKw',
              vkzyiybF: 762,
              mbHcTjTk: true,
              lpTXhJIu: 0.9044203649447724
            }
          },
          uszorzIa: 683,
          ZSXKrZcK: 589,
          EPIBxpda: false
        },
        TAhWdyQI: {
          GmGlwadX: 0.07260820123948841,
          oUrEBIxh: false,
          QQVrfBgx: 'zHtTjJl',
          XVpvGtON: null,
          JpeRxiVu: 0.007310863658203104,
          rRaPAAoo: {
            XdyWuVLQ: 0.6644858232080231,
            jbNiHRoN: 979,
            UIzfbBVY: 'tgWe',
            RRBKfPBv: 0.4678891584339877,
            jkrRfnxD: 'ApqoGpi',
            tqbqMHjc: null,
            XNwMjMqz: false
          },
          TWbSfQSL: 553
        }
      },
      bARzFicd: 371,
      voGDXchb: 0.404082207305148,
      czhHunfI: {
        PNJUgweg: true,
        aptcXaHr: 'ViLM',
        JCOHjPKW: 'LOnDG',
        EpSluekD: 'MNdzqj',
        kjzxbbtE: {
          gQRwBOFC: 26,
          zTHKGxpC: 'xMqaFQT',
          osxNVvGn: 0.9200386158505891,
          rhMbCUUz: 0.456411419439837,
          JLaOrbrA: 719,
          ONXnVuIH: 'FEzyY',
          KEPnDRhp: null
        },
        gFOGssAr: true,
        YDoztSAx: false
      },
      ncipQKiE: false,
      ORqLDzrJ: 678,
      VKbCMPyO: false
    },
    LvesAdJX: false,
    MFRoToDJ: 377,
    sTaUMrMG: 'JEFnUl'
  },
  PnRWMDwh: 'BphBF'
}

function cloneDeep(value) {
  return cloneDeepHelper(value, new Map());
}

function cloneDeepHelper(val, seen) {
  switch (toString.call(val)) {
  case "[object Array]": {
    if (seen.has(val)) return seen.get(val);
    const copy = val.slice(0);
    seen.set(val, copy);
    copy.forEach(function (child, i) {
      copy[i] = cloneDeepHelper(child, seen);
    });
    return copy;
  }

  case "[object Object]": {
    if (seen.has(val)) return seen.get(val);
    const copy = Object.create(Object.getPrototypeOf(val));
    seen.set(val, copy);
    Object.keys(val).forEach(key => {
      copy[key] = cloneDeepHelper(val[key], seen);
    });
    return copy;
  }

  default:
    return val;
  }
}

function _isPlaceholder(a) {
  return a != null && typeof a === 'object' && a['@@functional/placeholder'] === true;
}

function _cloneRegExp(pattern) {
  return new RegExp(pattern.source, (pattern.global ? 'g' : '') + (pattern.ignoreCase ? 'i' : '') + (pattern.multiline ? 'm' : '') + (pattern.sticky ? 'y' : '') + (pattern.unicode ? 'u' : ''));
}

function _curry1(fn) {
  return function f1(a) {
    if (arguments.length === 0 || _isPlaceholder(a)) {
      return f1;
    } else {
      return fn.apply(this, arguments);
    }
  };
}

var type =
_curry1(function type(val) {
  return val === null ? 'Null' : val === undefined ? 'Undefined' : Object.prototype.toString.call(val).slice(8, -1);
});

function _clone(value, refFrom, refTo, deep) {
  var copy = function copy(copiedValue) {
    var len = refFrom.length;
    var idx = 0;

    while (idx < len) {
      if (value === refFrom[idx]) {
        return refTo[idx];
      }

      idx += 1;
    }

    refFrom[idx + 1] = value;
    refTo[idx + 1] = copiedValue;

    for (var key in value) {
      copiedValue[key] = deep ? _clone(value[key], refFrom, refTo, true) : value[key];
    }

    return copiedValue;
  };

  switch (type(value)) {
    case 'Object':
      return copy({});

    case 'Array':
      return copy([]);

    case 'Date':
      return new Date(value.valueOf());

    case 'RegExp':
      return _cloneRegExp(value);

    default:
      return value;
  }
}

var clone =
_curry1(function clone(value) {
  return value != null && typeof value.clone === 'function' ? value.clone() : _clone(value, [], [], true);
});

Tests:

parse
JSON.parse(JSON.stringify(obj))
cloneDeep
cloneDeep(obj)
clone
clone(obj)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parse
cloneDeep
clone

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: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Windows

View result in a separate tab

Test name	Executions per second
parse	20689.5 Ops/sec
cloneDeep	8685.2 Ops/sec
clone	5274.9 Ops/sec

deep clone (bigger obj2) (version: 2)

Comparing performance of: parse vs cloneDeep vs clone

Created: one year ago by: Registered User

Jump to the latest result

parse

cloneDeep

clone

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A