Benchmark: Lodash DifferenceWith vs Native 2

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

var oldArr = [
  { name: "A", inputs: [{ name: "i-a", values: [{ name: "i-a-v", required: true }]}]},
  { name: "B", inputs: [{ name: "i-b", values: [{ name: "i-b-v", required: true }]}]}
];

var newArr = [
  { name: "A", inputs: [{ name: "i-a", values: [{ name: "i-a-v", required: false }]}]},
  { name: "B", inputs: [{ name: "i-b", values: [{ name: "i-b-v", required: true }]}]}
];

Tests:

Native
newArr.reduce((names, {name}) => { return names.concat( !oldArr.some(oldItem => oldItem.name === name) ? name : [] ); }, [])
Lodash.js filter
_.differenceWith(newArr, oldArr, _.isEqual);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native
Lodash.js filter

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.

**Overview of the Benchmark**

The provided benchmark is designed to compare the performance of two approaches for finding the difference between two arrays: native JavaScript and Lodash's `differenceWith` function.

**Test Cases**

There are two test cases:

1. **Native**: This test case uses native JavaScript to find the difference between two arrays using the `reduce` method.
2. **Lodash.js filter**: This test case uses Lodash's `differenceWith` function to find the difference between two arrays.

**Options Compared**

The benchmark is comparing the following options:

* **Native JavaScript**: Uses native JavaScript to find the difference between two arrays using the `reduce` method.
* **Lodash.js**: Uses Lodash's `differenceWith` function to find the difference between two arrays.

**Pros and Cons of Each Approach**

* **Native JavaScript**
	+ Pros:
		- Simple and efficient code
		- No external dependencies
	+ Cons:
		- May have performance issues due to array iteration
		- May not be as readable or maintainable as other approaches
* **Lodash.js**
	+ Pros:
		- Well-tested and optimized function
		- Easy to use and understand
		- Reduces the need for complex loop logic
	+ Cons:
		- Adds external dependency (Lodash library)
		- May have performance issues due to function overhead

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, string manipulation, and more. The `differenceWith` function is part of the Lodash library and is used in this benchmark to find the difference between two arrays.

**Special JS Feature/Syntax: None**

There are no special JavaScript features or syntax used in this benchmark that would require additional explanation.

**Other Alternatives**

If you want to implement a similar benchmark, here are some alternative approaches:

* **Using `Array.prototype.filter()`**: Instead of using `reduce`, you can use the `filter` method to find the difference between two arrays.
* **Using `Set` data structure**: You can use the `Set` data structure to find the difference between two arrays by converting each array to a set and then finding the difference between them.

Here's an example of how you could implement this using `Array.prototype.filter()`:
```javascript
const newArr = [
  { name: 'A', inputs: [{ name: 'i-a', values: [{ name: 'i-a-v', required: false }] }] },
  { name: 'B', inputs: [{ name: 'i-b', values: [{ name: 'i-b-v', required: true }] }] }
];

const diffSet = new Set();
oldArr.forEach(oldItem => {
  if (newArr.some(newItem => newItem.name === oldItem.name)) {
    diffSet.add(oldItem.name);
  }
});

const diffArr = Array.from(diffSet).map(name => newArr.find(item => item.name === name));
```
Note that these alternatives may have different performance characteristics and may not be as efficient or readable as the native JavaScript approach.

Related benchmarks:

Lodash DifferenceWith vs Native 2 (version: 0)

Comparing performance of: Native vs Lodash.js filter

Created: 2 years ago by: Guest

Jump to the latest result

Native

Lodash.js filter

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):