Run details:
Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.106 Safari/537.36
Chrome 91
Windows
Desktop
3 years ago
Test name Executions per second
Lodash cloneDeep 590334.8 Ops/sec
Json clone 347505.3 Ops/sec
Fast deep clone 806534.9 Ops/sec
HTML Preparation code:
x
 
1
2
<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)