Benchmark: My benchmark123132312312321

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/immer@3.1.3/dist/immer.umd.min.js"></script>
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

state =  {
    data: {
      data1: {
        data2: 'test',
      },
      data3: Array.from({length: 1000}).map(() => document.createElement('div'))
    }
  };

Tests:

123
const result = immer.produce(state, draft => { draft.data.data1.data2 = 'updated' })
321
const result = _.cloneDeep(state); result.data.data1.data2 = 'updated';
555
const state2 = { ...state, data: { ...state.data, data1: { ...state.data.data1 } } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
123
321
555

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON and explain what's being tested, compared options, pros and cons, and other considerations.

**Benchmark Definition:**

The benchmark is comparing three approaches to updating a nested object in JavaScript:

1. Using the `immer` library:
```javascript
const result = immer.produce(state, draft => { draft.data.data1.data2 = 'updated' });
```
This approach uses an immutable data structure and creates a new copy of the state using the `produce` function from the `immer` library.

2. Using Lodash's `cloneDeep` function:
```javascript
const result = _.cloneDeep(state);
result.data.data1.data2 = 'updated';
```
This approach creates a deep copy of the original state using Lodash's `cloneDeep` function and then updates the copied state.

3. Using object destructuring (spread operator):
```javascript
const state2 = {
  ...state,
  data: {
    ...state.data,
    data1: {
      ...state.data.data1,
    },
  },
};
```
This approach creates a new object by spreading the original state and then updating the nested objects.

**Options Compared:**

* Immutable data structures (immer) vs. mutable data structures
* Deep copying libraries (Lodash's `cloneDeep`) vs. built-in spread operator

**Pros and Cons:**

1. **Immer**:
	* Pros:
		+ Ensures immutability, reducing side effects and making code easier to reason about.
		+ Reduces the risk of unexpected state changes.
	* Cons:
		+ Can be slower due to the creation of a new copy of the state.
		+ May require additional libraries (e.g., `immer`).
2. **Lodash's `cloneDeep`**:
	* Pros:
		+ Provides a simple and efficient way to create deep copies of objects.
		+ Can be faster than immutability approaches.
	* Cons:
		+ May not ensure immutability, as the original state is still modified.
		+ Can lead to unexpected side effects if not used carefully.
3. **Spread Operator**:
	* Pros:
		+ Is a built-in JavaScript feature, making it lightweight and easy to use.
		+ Ensures immutability by creating new objects.
	* Cons:
		+ May not be as efficient as using libraries like `immer` or Lodash's `cloneDeep`.

**Library:**

The `immer` library provides a way to work with immutable data structures in JavaScript. It's designed to make functional programming easier and more accessible.

**Special JS Feature/Syntax:**

None mentioned explicitly, but the use of spread operator (`...`) is a built-in JavaScript feature that allows creating new objects by copying existing properties.

**Other Considerations:**

* Performance: The benchmark results show that the immutability approaches (immer and spread operator) are faster than Lodash's `cloneDeep`. However, this may depend on the specific use case and requirements.
* Code Readability: Immutability can make code easier to read and reason about, as it reduces side effects and ensures predictable behavior. However, it may also add overhead due to the creation of new objects.

**Alternatives:**

* Other libraries for immutable data structures: e.g., `react-immutable` or `mobx`.
* Alternative approaches to updating nested objects: e.g., using a separate update function that returns a new object.
* Using JavaScript's built-in `Object.assign()` method instead of spread operator.

Related benchmarks:

My benchmark123132312312321 (version: 0)

Comparing performance of: 123 vs 321 vs 555

Created: 3 years ago by: Guest

Jump to the latest result

123

321

555

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):