Benchmark: lodash clonedeep vs json.parse(stringify()) vs recursivecopy heavy

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....',
    x: {
      description: 'Creates a deep copy of source, which should be an object or an array.',
      myNumber: 123456789,
      myBoolean: true,
      bsae64String: 'abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123abc123',
      jayson: {
        stringify: 'JSON.stringify() method converts a JavaScript value to a JSON string....',
        parse: 'JSON.parse() method parses a JSON string...'
      }
    },
    parse: 'JSON.parse() method parses a JSON string...'
  }
};

var myCopy = null;

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;
  }

Tests:

Lodash CloneDeep
myCopy = _.cloneDeep(MyObject);
Json Clone
myCopy = JSON.parse(JSON.stringify(MyObject));
recursiveDeepCopy
myCopy = recursiveDeepCopy(MyObject);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash CloneDeep
Json Clone
recursiveDeepCopy

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:130.0) Gecko/20100101 Firefox/130.0

Browser/OS: Firefox 130 on Windows

View result in a separate tab

Test name	Executions per second
Lodash CloneDeep	699873.0 Ops/sec
Json Clone	383450.9 Ops/sec
recursiveDeepCopy	4960478.5 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):

LLMs can make mistakes. Check important info.

I'd be happy to explain what's being tested in the provided benchmark.

The test aims to compare the performance of three different methods for creating a deep copy of an object:

1. **Lodash `cloneDeep`**: This method uses a recursive approach to create a deep copy of an object.
2. **`JSON.parse(JSON.stringify())`**: This method uses the `Stringify()` and `Parse()` methods of the JSON object to create a deep copy of an object.
3. **`recursiveDeepCopy`**: This is a custom implementation of a recursive function that creates a deep copy of an object.

**Options Comparison:**

*   The three options are compared in terms of their performance, which is measured by the number of executions per second (ExecutionsPerSecond).
*   Each option has its own strengths and weaknesses:
    *   Lodash `cloneDeep`: This method is well-tested and optimized for deep copying objects. However, it may not be suitable for very large objects due to memory constraints.
    *   `JSON.parse(JSON.stringify())`: This method can work with any JSON-serializable object, but it's not the most efficient way to create a deep copy, especially for complex objects.
    *   `recursiveDeepCopy`: This custom implementation provides more control over the copying process, but it may require more code and maintenance.

**Pros and Cons:**

*   Lodash `cloneDeep`:
    *   Pros: Optimized, tested, and widely adopted; suitable for most use cases.
    *   Cons: May not work well with very large objects due to memory constraints.
*   `JSON.parse(JSON.stringify())`:
    *   Pros: Works with any JSON-serializable object; simple implementation.
    *   Cons: Not optimized for performance, may not work correctly with complex objects, and can be slower than other methods.
*   `recursiveDeepCopy`:
    *   Pros: Provides more control over the copying process; can handle complex objects more effectively.
    *   Cons: Requires more code and maintenance; may not be suitable for all use cases.

**Other Considerations:**

*   Memory usage: Creating a deep copy of an object can be memory-intensive, especially if the object contains many nested properties. Optimal solutions should consider this factor to avoid excessive memory usage.
*   Performance: The performance difference between these methods can vary depending on the size and complexity of the objects being copied.

**Alternative Methods:**

Some other alternatives for creating deep copies of objects include:

1.  **Object.assign()**: This method creates a shallow copy of an object, which may not be suitable for all use cases.
2.  **Array.prototype.slice()**: This method creates a shallow copy of an array, similar to `Object.assign()`.
3.  **For...of loops**: You can use For...of loops in combination with Object.create() and Array.from() to create a deep copy of objects and arrays.

Keep in mind that these alternatives may not provide the same level of performance or control as Lodash's `cloneDeep` method, and some might require more code and maintenance.

Related benchmarks:

lodash clonedeep vs json.parse(stringify()) vs recursivecopy heavy (version: 0)

Comparing performance of: Lodash CloneDeep vs Json Clone vs recursiveDeepCopy

Created: 3 months ago by: Guest

Jump to the latest result

Lodash CloneDeep

Json Clone

recursiveDeepCopy

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 2 months ago):