Benchmark: Lodash difference vs filter & some

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>

Script Preparation code:

var disabledObjIds = [{ id: 55}, { id: 60 }]

var disabledIds = [55, 60];
var ids = [...Array(100)].map((el, ind) => ind);

Tests:

Filter + some
ids.filter(id => !disabledObjIds.some(obj => obj.id === id))
Lodash difference
_.difference(ids, disabledIds)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Filter + some
Lodash difference

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.

Let's break down the provided benchmark definition and test cases.

**Benchmark Definition**

The benchmark measures the performance difference between two approaches:

1. Using the `filter()` method with an arrow function that checks if an element is not in the `disabledObjIds` array using the `some()` method.
2. Using the `difference()` function from Lodash (a popular JavaScript utility library) to find the difference between two arrays.

**Options Compared**

In this benchmark, we have two options being compared:

* `Filter + some`: This approach uses the `filter()` method with an arrow function that checks if an element is not in the `disabledObjIds` array using the `some()` method.
* `Lodash difference`: This approach uses the `difference()` function from Lodash to find the difference between two arrays.

**Pros and Cons of Each Approach**

1. **Filter + some**:
	* Pros: Simple, easy to understand, and well-supported by most JavaScript engines.
	* Cons: May be slower than other approaches due to the overhead of creating a temporary array with `some()` results.
2. **Lodash difference**:
	* Pros: Optimized for performance and can take advantage of browser-specific optimizations (e.g., SIMD operations). Also, Lodash provides a more concise way to express this operation.
	* Cons: Requires importing the Lodash library, which may add overhead in some cases.

**Library Used**

In this benchmark, we're using Lodash, a popular JavaScript utility library. The `difference()` function is part of Lodash's set manipulation utilities.

**Special JS Features or Syntax**

There are no special JavaScript features or syntaxes being used in this benchmark that would require expertise to understand.

**Other Alternatives**

If you wanted to implement the same logic without using Lodash, you could use a simple loop to find the difference between two arrays. Here's an example:
```javascript
function filterDifference(ids, disabledIds) {
  const result = [];
  for (const id of ids) {
    if (!disabledIds.includes(id)) {
      result.push(id);
    }
  }
  return result;
}
```
This implementation would likely be slower than the Lodash `difference()` function but can be useful for understanding how the logic works.

Keep in mind that using a loop to find the difference between two arrays can lead to performance issues with large datasets. In such cases, libraries like Lodash or native JavaScript methods are often preferred.

Related benchmarks:

Lodash difference vs filter & some (version: 0)

Comparing performance of: Filter + some vs Lodash difference

Created: 2 years ago by: Guest

Jump to the latest result

Filter + some

Lodash difference

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):