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Lodash difference vs isEqual
(version: 0)
Comparing performance of:
difference vs isEqual
Created:
4 years ago
by:
Guest
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HTML Preparation code:
<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>
Script Preparation code:
const a = []
Tests:
difference
const array1 = [5,4,8,9,3,6,11,15,12,20,50,30,33,52] const array2 = [6,8,9,5,4,3,20,30,52,33,52,15,11,12] console.log(!(_.difference(array1, array2).length || _.difference(array2, array1).length))
isEqual
const array1 = [5,4,8,9,3,6,11,15,12,20,50,30,33,52] const array2 = [6,8,9,5,4,3,20,30,52,33,52,15,11,12] console.log(_.isEqual(array1.sort(), array2.sort()))
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
difference
isEqual
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and explain what's being tested. **Benchmark Overview** The benchmark is designed to compare the performance of two functions from the Lodash library: `difference` and `isEqual`. The test cases are simple JavaScript arrays with duplicate elements, and the goal is to measure which function is faster when used to compare these arrays. **Options Compared** There are two main options being compared: 1. **Lodash `difference`**: This function returns an array of elements that are in `array1` but not in `array2`, or vice versa. 2. **Lodash `isEqual` with sorting**: This function checks if two sorted arrays are equal. The test case sorts both arrays before comparing them. **Pros and Cons** * **Lodash `difference`**: + Pros: Fast and efficient, as it only iterates over the elements in one array. + Cons: May be slower for large arrays, as it requires an extra sort operation to find the differences. * **Lodash `isEqual` with sorting**: + Pros: Provides a more accurate comparison by sorting both arrays before comparing them, which ensures that the order of elements matters. + Cons: Slower due to the additional sort operation, and may be slower for large arrays. **Library and Its Purpose** The Lodash library is a collection of high-order functions that make it easier to perform common JavaScript tasks. In this case, `difference` and `isEqual` are two examples of utility functions provided by Lodash. The `difference` function returns an array of elements that are in one array but not the other, while `isEqual` checks if two arrays are equal. **Special JS Features or Syntax** None mentioned in this benchmark. **Other Considerations** * The test case uses a relatively small input size (12 elements), which may not accurately represent larger datasets. * The comparison is done using console.log statements, which can add additional overhead due to the need for logging and display updates. * The benchmark uses Chrome 115 as the browser and Mac OS X 10.15.7 as the operating system, which may affect the results. **Alternatives** If Lodash is not an option, alternative JavaScript libraries or built-in functions could be used: * For `difference`, a simple array iteration using `forEach` or `reduce` could be used. * For `isEqual`, a custom implementation using `every` and `includes` methods could be used. However, these alternatives would likely be slower and less efficient than the Lodash implementation.
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