Benchmark: Lodash: difference vs intersection22

HTML Preparation code:

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

Script Preparation code:

var arrFull = _.range(1, 1000000);
var arrOne = _.range(1, 100000);

Tests:

Difference - Full
_.difference(arrFull, arrFull)
Intersection - Full
_.intersection(arrFull, arrFull)
Difference - Partial
_.difference(arrFull, arrOne)
Intersection - Partial
_.intersection(arrOne, arrFull)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Difference - Full
Intersection - Full
Difference - Partial
Intersection - Partial

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Safari/537.36

Browser/OS: Chrome 80 on Linux

View result in a separate tab

Test name	Executions per second
Difference - Full	13.0 Ops/sec
Intersection - Full	6.4 Ops/sec
Difference - Partial	25.8 Ops/sec
Intersection - Partial	16.3 Ops/sec

Autogenerated LLM Summary (model gemma2:9b, generated one month ago):

LLMs can make mistakes. Check important info.

This benchmark tests the performance of  Lodash's `difference` and `intersection` methods for finding differences and intersections between arrays.

Let's break down the options being compared:

* **_.difference(arrFull, arrFull):**  Calculates the difference between a full array (`arrFull`) and itself. This essentially finds empty array as there is no difference.
* **_.intersection(arrFull, arrFull):** Calculates the intersection of a full array (`arrFull`) with itself, which would result in the entire `arrFull` array being returned. 
* **_.difference(arrFull, arrOne):** Finds the difference between the full array (`arrFull`) and a smaller array (`arrOne`).
* **_.intersection(arrOne, arrFull):**  Finds the intersection between the smaller array (`arrOne`) and the full array (`arrFull`).

**Pros and Cons:**

The benchmark doesn't explicitly state performance differences. However, we can infer:

* `difference(arrFull, arrFull)` and `intersection(arrFull, arrFull)` are likely very fast because they involve comparing identical arrays.
*  `difference(arrFull, arrOne)` and `intersection(arrOne, arrFull)` will likely have varying performance depending on the size of `arrFull` and `arrOne`.

**Lodash:**

Lodash is a popular JavaScript library that provides utility functions for working with arrays, objects, strings, and more. It's known for its efficient implementations and broad functionality.

**Alternatives:**

While Lodash offers powerful array manipulation methods,  you can often achieve similar results using native JavaScript methods:

* `Array.filter` to find elements in one array that are not present in another (similar to `difference`).
* `Array.some` and `Array.every` to check if elements from one array exist in another (can be used for intersection logic).

Let me know if you have any other questions!

Related benchmarks:

Lodash: difference vs intersection22 (version: 0)

Comparing performance of: Difference - Full vs Intersection - Full vs Difference - Partial vs Intersection - Partial

Created: 4 years ago by: Guest

Jump to the latest result

Difference - Full

Intersection - Full

Difference - Partial

Intersection - Partial

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model gemma2:9b, generated one month ago):