Benchmark: Lodash: pullAllBy vs differenceBy

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

function generateArr(arraOfIds) {
  	return arraOfIds.map(id => ({ id: id, name: 'title-'+id }));
}

const length = 10000;

const arrIds1 = [...Array(length).keys()];
var arr1 = generateArr(arrIds1);

const arrIds2 = [];
for(let i = 0; i < length; i += 100) {
  arrIds2.push(i);
}
var arr2 = generateArr(arrIds2);

Tests:

pullAllBy
_.pullAllBy(arr1, arr2, 'id');
differenceBy
const result = _.differenceBy(arr1, arr2, 'id');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
pullAllBy
differenceBy

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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.

**Benchmark Overview**

The benchmark compares two optimization algorithms in Lodash: `pullAllBy` and `differenceBy`. These functions are used to filter arrays based on a specified property (in this case, an "id" property).

**Options Compared**

The two options being compared are:

1. **`_.pullAllBy(arr1, arr2, 'id')`:**
	* This function returns the elements in `arr1` that have the same value as any element in `arr2` for the specified property (`'id'`).
	* The pros of this approach include:
		+ Simple and straightforward implementation.
		+ Efficient use of array methods, as it only iterates over each array once.
	* However, its cons are:
		+ May not be suitable for large arrays, as it requires a nested loop (one for each element in `arr1`).
2. **`const result = _.differenceBy(arr1, arr2, 'id');`:**
	* This function returns the elements in `arr1` that have a value different from any element in `arr2` for the specified property (`'id'`).
	* The pros of this approach include:
		+ More efficient than `pullAllBy`, as it only iterates over each array once and uses a set to keep track of unique values.
		+ Can be more accurate, especially when dealing with large arrays or complex filtering logic.
	* However, its cons are:
		+ May require additional memory for the set data structure.

**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. In this benchmark, Lodash's `pullAllBy` and `differenceBy` functions are used to compare their performance.

**Special JS Feature/ Syntax**

There doesn't appear to be any special JavaScript features or syntax being utilized in this benchmark. The code is straightforward and uses standard JavaScript and Lodash functions.

**Other Alternatives**

If you're interested in exploring alternative approaches, here are a few options:

1. **`Array.prototype.filter()`**: You can use `filter()` to achieve similar results as `pullAllBy`. However, it may not be as efficient as the optimized versions provided by Lodash.
2. **`Map` data structure**: You can use `Map` to keep track of unique values and filter arrays. This approach would require more memory and computational resources than the optimized Lodash functions.

Keep in mind that these alternatives might not provide the same level of performance or simplicity as the optimized Lodash functions.

I hope this explanation helps!

Related benchmarks:

Lodash: pullAllBy vs differenceBy (version: 0)

Comparing performance of: pullAllBy vs differenceBy

Created: 4 years ago by: Guest

Jump to the latest result

pullAllBy

differenceBy

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):