Benchmark: Lodash: difference vs intersection

HTML Preparation code:

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

Script Preparation code:

var arr = ['past','present','future']

Tests:

Difference
_.difference(arr, arr)
Interesection
_.intersection(arr, arr)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Difference
Interesection

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 22 days ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Windows

View result in a separate tab

Test name	Executions per second
Difference	21599732.0 Ops/sec
Interesection	14641498.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON benchmark definition and explain what's being tested, compared, and the pros/cons of each approach.

**Benchmark Definition**

The benchmark is focused on measuring the performance difference between two Lodash functions: `_.difference` (calculating the difference between two arrays) and `_.intersection` (calculating the intersection of two arrays). The input array is initialized as `arr = ['past','present','future']`.

**Options Compared**

Two options are being compared:

1. **_.difference(arr, arr)**: This option calculates the difference between the input array `arr` and itself. Since there's no common element in an array and itslef, this should result in an empty array.
2. **_.intersection(arr, arr)**: This option calculates the intersection of the input array `arr` with itself. In this case, since all elements are identical, the intersection will be equal to the original array.

**Pros/Cons of Each Approach**

1. **_.difference(arr, arr)**:
	* Pros: Simple and straightforward calculation.
	* Cons: Since there's no actual difference between the input array and itself, this might not accurately represent a meaningful benchmarking scenario.
2. **_.intersection(arr, arr)**:
	* Pros: This option highlights the performance of Lodash functions in handling identical elements or arrays.
	* Cons: As mentioned earlier, calculating the intersection of an array with itself may not be representative of a typical use case.

**Library and Purpose**

Lodash is a popular JavaScript library that provides utility functions for tasks such as array manipulation, functional programming, and more. The `_.difference` and `_.intersection` functions are part of Lodash's array manipulation suite, which helps developers simplify common array operations.

**Special JS Feature or Syntax**

None mentioned in this specific benchmark definition.

**Other Alternatives**

For similar benchmarks, you could consider:

* Comparing the performance of different JavaScript libraries for array manipulation (e.g., Ramda, FPJS)
* Measuring the performance of custom implementation vs. built-in JavaScript functions (e.g., `Array.prototype.filter()` vs. a handwritten equivalent)

Keep in mind that the choice of benchmark definition and test cases ultimately depends on the specific use case or scenario you want to measure.

The provided benchmark definition is relatively simple and focused on showcasing Lodash's performance for array manipulation tasks.

Related benchmarks:

Lodash: difference vs intersection (version: 0)

Comparing performance of: Difference vs Interesection

Created: 8 years ago by: Guest

Jump to the latest result

Difference

Interesection

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):