Run results for: Lodash cloneDeep vs JSON Clone vs fastDeepClone

Run details:

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:132.0) Gecko/20100101 Firefox/132.0

Browser: Firefox 132

Operating system: Windows

Device Platform: Desktop

Date tested: one year ago

Fast deep clone

3.3M/s

Lodash cloneDeep

719K/s

Json clone

619K/s

View exact numbers

Test name	Executions per second
✓ Fast deep clone	3,291,662 Ops/sec
Lodash cloneDeep	718,782 Ops/sec
Json clone	618,544 Ops/sec

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></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...'
  }
};

function deepClone(preObj) {
    let newObj, value, key;
    if (typeof preObj !== "object" || preObj === null) {
        return preObj;
    }
    newObj = Array.isArray(preObj) ? [] : {}
    for (key in preObj) {
        value = preObj[key];
        newObj[key] = deepClone(value);
    }
    return newObj
}

var myCopy = null;

Tests:

Lodash cloneDeep
myCopy = _.cloneDeep(MyObject);
Json clone
myCopy = JSON.parse(JSON.stringify(MyObject));
Fast deep clone
deepClone(MyObject)