Benchmark: lodash cloneDeep vs. JSON.parse(JSON.stringify()) vs. fastest-json-copy vs. makePlain

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/jsondiffpatch@0.4.1/dist/jsondiffpatch.umd.min.js'></script>
<script src='https://cdn.jsdelivr.net/npm/rfdc@1.3.0'></script>

Script Preparation code:

function C() {}
var MyObject = {
    a: 1,
    b: 'b',
    c: new C(),
    d: [1, 2, 3, new C()],
    e: {
        a: 1,
        b: 'b',
        c: new C(),
        d: [1, 2, 3, new C()],
    },
    f: [1, 2, 3, {
        a: 1,
        b: 'b',
        c: new C(),
        d: [1, 2, 3, new C()],
    }],
    g: Date(),
    h: new Set([1, 2, 3]),
    i: new Map([['a', 1], ['b', 2], ['c', 3]]),
    nested: {
        description: 'Creates a deep copy of source, which should be an object or an array.',
        myNumber: 123456789,
        myBoolean: true,
        jayson: {
        stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
        parse: 'JSON.parse() method parses a JSON string...'
        }
    }
};

var myCopy = null;

var jsondiffpatchClone = jsondiffpatch.clone;
var rfdcClone = rfdc();

///////////////////////////////////////////////////////////////////
function recursiveDeepCopy(o) {
    var newO,
      i;
  
    if (typeof o !== 'object') {
      return o;
    }
    if (!o) {
      return o;
    }
  
    if ('[object Array]' === Object.prototype.toString.apply(o)) {
      newO = [];
      for (i = 0; i < o.length; i += 1) {
        newO[i] = recursiveDeepCopy(o[i]);
      }
      return newO;
    }
  
    newO = {};
    for (i in o) {
      if (o.hasOwnProperty(i)) {
        newO[i] = recursiveDeepCopy(o[i]);
      }
    }
    return newO;
  }
//////////////////////////////////////////////////////////////////
// Use https://www.npmjs.com/package/fastest-json-copy
// Instead of the code below! It is the same thing, just minified.
var isArray=Array.isArray;function fastestJsonCopy(r){if(!r)return r;if(isArray(r)){for(var e=[],o=r.length,t=0;t<o;t++)e.push(fastestJsonCopy(r[t]));return e}if("object"==typeof r){var y=Object.keys(r),a=(o=y.length,{});for(t=0;t<o;t++){var c=y[t];a[c]=fastestJsonCopy(r[c])}return a}return r}

function makePlain(instance) {
    if (!instance) {
        return instance
    }
    if (instance instanceof Array) {
        const plain = []
        for (let i = 0; i < instance.length; i++) {
            plain[i] = makePlain(instance[i])
        }
        return plain
    }
    if (instance.constructor === Object) {
        const plain = {}
        const keys = Object.keys(instance)
        for (let i = 0; i < keys.length; i++) {
            plain[keys[i]] = makePlain(instance[keys[i]])
        }
        return plain
    }
    const isNative = instance.constructor.toString().indexOf('native code') !== -1
    if (isNative) {
        return instance
    }
    const plain = {}
    const keys = Object.keys(instance)
    for (let i = 0; i < keys.length; i++) {
        plain[keys[i]] = makePlain(instance[keys[i]])
    }
    return plain
}

Tests:

lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
JSON.parse(JSON.stringify())
myCopy = JSON.parse(JSON.stringify(MyObject));
recursiveDeepCopy
myCopy = recursiveDeepCopy(MyObject);
fastest-json-copy npm package
myCopy = fastestJsonCopy(MyObject);
jsondiffpatch.clone()
myCopy = jsondiffpatchClone(MyObject);
rfdc
myCopy = rfdcClone(MyObject);
makePlain
myCopy = makePlain(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash cloneDeep
JSON.parse(JSON.stringify())
recursiveDeepCopy
fastest-json-copy npm package
jsondiffpatch.clone()
rfdc
makePlain

Fastest: N/A

Slowest: N/A

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Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36

Browser/OS: Chrome 111 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
lodash cloneDeep	160789.1 Ops/sec
JSON.parse(JSON.stringify())	304969.9 Ops/sec
recursiveDeepCopy	296047.0 Ops/sec
fastest-json-copy npm package	216890.8 Ops/sec
jsondiffpatch.clone()	1410844.0 Ops/sec
rfdc	560966.3 Ops/sec
makePlain	77721.5 Ops/sec

lodash cloneDeep vs. JSON.parse(JSON.stringify()) vs. fastest-json-copy vs. makePlain | On a Small Object (version: 0)

Comparing performance of: lodash cloneDeep vs JSON.parse(JSON.stringify()) vs recursiveDeepCopy vs fastest-json-copy npm package vs jsondiffpatch.clone() vs rfdc vs makePlain

Created: one year ago by: Guest

Jump to the latest result

lodash cloneDeep

JSON.parse(JSON.stringify())

recursiveDeepCopy

fastest-json-copy npm package

jsondiffpatch.clone()

rfdc

makePlain

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A