Benchmark: Lodash vs IMMUTABLE COPY vs Manual

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/immutable/3.8.2/immutable.min.js'></script>
<script>
function copyDeep(value) {
  	if(!value)
  		return value;
    if (value.constructor === Array) {
        return value.map(copyDeep);
    }
    if (value.constructor === Object) {
        const copy = {};
        for (let k in value) {
            copy[k] = copyDeep(value[k]);
        }
        return copy;
    }
    return value;
}
</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;

Tests:

Immutable
myCopy = Immutable.fromJS(MyObject).toJS()
Lodash
myCopy = _.cloneDeep(MyObject)
Manual
myCopy = copyDeep(MyObject)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Immutable
Lodash
Manual

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its options.

**Benchmark Definition:**

The benchmark compares three approaches to create a deep copy of an object:

1. **Immutable Copy**: The `Immutable` library creates a new, immutable copy of the original object.
2. **Lodash Clone Deep**: The `lodash` library provides a function `cloneDeep()` that creates a deep copy of the original object.
3. **Manual Copy**: A custom implementation (not shown in the provided code) is used to create a deep copy of the original object.

**Options Compared:**

* Immutable vs Lodash Clone Deep
* Immutable Clone Deep (not present in the benchmark results)

Pros and Cons:

* **Immutable Copy**:
	+ Pros: Immutable, thread-safe, and predictable behavior.
	+ Cons: Additional library dependency, potentially slower due to immutable nature.
* **Lodash Clone Deep**:
	+ Pros: Fast, widely adopted, and well-documented.
	+ Cons: Not entirely thread-safe (depending on usage), may not be suitable for all use cases.

**Library Descriptions:**

1. **Immutable**: A library that provides immutable data structures, allowing you to create new copies of objects without modifying the original. This helps ensure predictable behavior in concurrent environments.
2. **Lodash**: A utility library providing a wide range of functions for common tasks, including array and object manipulation.

**Special JS Feature or Syntax:**

None mentioned in the provided benchmark.

**Other Considerations:**

* Performance: The manual copy implementation may be faster due to its simplicity, but it lacks thread safety and predictability.
* Development Time: Using an existing library like Lodash can save development time, as it provides a well-tested and widely adopted implementation.

**Alternative Approaches:**

1. **Array.prototype.slice()**: Instead of using `Immutable` or `Lodash`, you could use `Array.prototype.slice()` to create a shallow copy of arrays.
2. **Object.assign()**: For objects, you can use `Object.assign()` to create a shallow copy.
3. **Spread Operator (`{ ... }`)**: For objects, you can use the spread operator (`{ ... }`) to create a new object with copied properties.

Keep in mind that these alternatives may not be suitable for all use cases, especially when dealing with complex data structures or concurrent environments. The provided benchmark results will help determine which approach is best suited for your specific requirements.

Related benchmarks:

Lodash vs IMMUTABLE COPY vs Manual (version: 0)

Lodash vs Immutable Copying

Comparing performance of: Immutable vs Lodash vs Manual

Created: 3 years ago by: Guest

Jump to the latest result

Immutable

Lodash

Manual

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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