Benchmark: Lodash isEqual with sort vs Lodash difference

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.15/lodash.min.js"></script>

Script Preparation code:

window.foo1 = [1,2,4,3,5,6,11,8,9,2,11,12];
window.bar1 = [33,10,11,12,1,2,3,4,5,6,7,8,9,44];

Tests:

_.isEqual
_.isEqual(window.foo1.sort(), window.bar1.sort())
_.difference
_.difference(window.foo1, window.bar1)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
_.difference

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the explanation of the provided JSON benchmark definition and test cases.

**Benchmark Definition**

MeasureThat.net is testing the performance of two functions from the Lodash library:

1. `_.isEqual(window.foo1.sort(), window.bar1.sort())`
2. `_.difference(window.foo1, window.bar1)`

These functions are being compared to determine which one performs better in terms of execution time.

**Options Compared**

The benchmark is comparing two different approaches:

1. **Sorting and then comparing**: The first function sorts both arrays before comparing them using `_.isEqual`. This approach can be beneficial if the order of elements matters.
2. **Finding the difference directly**: The second function uses `_.difference` to find the difference between the two arrays without sorting them beforehand.

**Pros and Cons**

**Sorting and then comparing ( _.isEqual )**

Pros:

* If the order of elements matters, this approach is more accurate because it preserves the original order.
* It can be beneficial if the data is not already sorted or needs to be sorted for other reasons.

Cons:

* Sorting both arrays can be computationally expensive, especially for large datasets.
* This approach may not be necessary if the order of elements does not matter.

**Finding the difference directly ( _.difference )**

Pros:

* Faster execution time because it avoids sorting both arrays.
* More memory-efficient since it only requires finding the difference between two arrays.

Cons:

* May not preserve the original order of elements, which could be important in certain scenarios.
* Requires Lodash's `_.difference` function to be included in the benchmark.

**Lodash Library and Its Purpose**

The Lodash library is a JavaScript utility library that provides a set of functions for tasks such as:

* Array manipulation (e.g., sorting, filtering, mapping)
* String manipulation
* Object manipulation
* Math and statistical operations

In this specific case, the `_.isEqual` function checks whether two values are equal, while the `_.difference` function finds the difference between two arrays.

**Special JS Feature/Syntax**

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

**Other Alternatives**

If you're interested in exploring alternative approaches, you could consider:

* Using a different library for array manipulation, such as the Array.prototype methods (e.g., `sort()`, `filter()`).
* Implementing your own custom sorting or difference algorithm.
* Comparing the performance of using different sorting algorithms (e.g., quicksort, mergesort).

Keep in mind that these alternatives may not provide the same level of performance as the Lodash library functions, especially for large datasets.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36

Browser/OS: Chrome 94 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
_.isEqual	795216.4 Ops/sec
_.difference	1257577.1 Ops/sec

Related benchmarks:

Lodash isEqual with sort vs Lodash difference (version: 0)

Test on isEqual bs difference performance

Comparing performance of: _.isEqual vs _.difference

Created: 3 years ago by: Guest

Jump to the latest result

_.isEqual

_.difference

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):