Run results for: lodash cloneDeep vs. JSON.parse(JSON.stringify()) vs. fastest-json-copy

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36

Browser: Chrome 131

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

jsondiffpatch.clone()

4.7M/s

rfdc

4.6M/s

recursiveDeepCopy

4.3M/s

fastest-json-copy npm package

3.8M/s

lodash cloneDeep

1.2M/s

JSON.parse(JSON.stringify())

1.0M/s

View exact numbers

Test name	Executions per second
✓ jsondiffpatch.clone()	4,689,678 Ops/sec
rfdc	4,643,259 Ops/sec
recursiveDeepCopy	4,343,182 Ops/sec
fastest-json-copy npm package	3,752,115 Ops/sec
lodash cloneDeep	1,171,102 Ops/sec
JSON.parse(JSON.stringify())	1,032,194 Ops/sec

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:

var MyObject = {
  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}

Tests: