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Lodash union vs native Set() implementation
(version: 0)
Comparing performance of:
_.union vs Set()
Created:
6 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Script Preparation code:
var a = [1, 2, 3, 4, 5] var b = [3, 4, 5, 6, 7]
Tests:
_.union
var c = _.union(a, b)
Set()
var c = [...new Set([...a, ...b])]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
_.union
Set()
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'd be happy to help you understand the JavaScript microbenchmark on MeasureThat.net. **Benchmark Overview** The benchmark compares two approaches for performing a union operation: Lodash's `_.union()` function and native JavaScript's `Set` constructor. **Script Preparation Code** The script preparation code sets up two arrays, `a` and `b`, which contain elements to be used in the union operation. The arrays are: ```javascript var a = [1, 2, 3, 4, 5] var b = [3, 4, 5, 6, 7] ``` **Html Preparation Code** The HTML preparation code includes a script tag that loads Lodash version 4.17.5 from a CDN. ```html <script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script> ``` **Benchmark Definition** The benchmark definition specifies two test cases: 1. `_.union`: This test case uses Lodash's `_.union()` function to perform the union operation. 2. `Set()`: This test case uses native JavaScript's `Set` constructor to perform the union operation. **Comparison of Approaches** Let's compare the two approaches: **Lodash's `_`.union():** Pros: * Well-documented and widely used library * Optimized for performance (especially when dealing with large datasets) * Supports various data types, including arrays, numbers, and strings Cons: * Adds additional overhead due to library imports * May have slower startup times compared to native implementations **Native JavaScript's `Set`:** Pros: * Native implementation means faster execution speeds * No additional overhead or dependencies * Fast and efficient for large datasets Cons: * Requires manual handling of iterations (e.g., using `for...of` loops) * Limited support for various data types, especially complex ones **Library: Lodash** Lodash is a popular JavaScript utility library developed by Isaac Schlueter. It provides a wide range of functional programming tools and helpers for tasks such as array manipulation, object transformation, and more. In this benchmark, Lodash's `_.union()` function is used to perform the union operation. The implementation is likely optimized for performance, which explains its relatively fast execution speeds in the benchmark. **Special JS Feature or Syntax** This benchmark does not utilize any special JavaScript features or syntax beyond standard ES6/ES7 features, such as template literals, arrow functions, and `for...of` loops. If it did, I'd be happy to explain them further! **Other Alternatives** If you're looking for alternatives to Lodash's `_.union()` function or native JavaScript's `Set` constructor, here are a few options: * For union operations: + Microsoft's `Array.prototype.union()`: A polyfilled implementation of the `union()` method that can be used with arrays. + Immutable.js: A library for working with immutable data structures, which includes methods for performing unions. * For native JavaScript's `Set` constructor: + Google's `Array.prototype.sort()` and `Array.prototype.unique()`: These methods can be used to create a set-like behavior for arrays. I hope this explanation helps you understand the JavaScript microbenchmark on MeasureThat.net!
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_.union vs native Set() implementation
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