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Lodash vs Javascript Regexp Intersection
(version: 0)
Comparing performance of:
Javascript Set Intersection vs Lodash Intersection
Created:
3 years ago
by:
Guest
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HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Script Preparation code:
var first = _.range(0, 10000, 4); var second = _.range(0, 10000, 2);
Tests:
Javascript Set Intersection
const firstRegex = new RegExp(first.join('|')) second.filter((s) => firstRegex.test(s))
Lodash Intersection
_.intersection(first, second)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Javascript Set Intersection
Lodash Intersection
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the benchmark test case and explain what's being tested, compared, and the pros and cons of each approach. **Benchmark Test Case Overview** The test case compares two approaches to find the intersection of two sets: using JavaScript regular expressions (regex) and using the Lodash library. The tests are designed to measure the performance difference between these two methods on a large dataset. **Test Cases** There are two individual test cases: 1. **JavaScript Set Intersection**: This test uses regex to create a pattern that matches elements in the `first` array, which is then used to filter the `second` array. 2. **Lodash Intersection**: This test uses Lodash's `intersection()` function to find the common elements between the `first` and `second` arrays. **Options Compared** The two options being compared are: * **JavaScript Regular Expressions (regex)**: This approach uses a regex pattern created from the `first` array to filter the `second` array. * **Lodash Intersection**: This approach uses Lodash's built-in `intersection()` function, which is designed specifically for finding common elements between arrays. **Pros and Cons of Each Approach** * **JavaScript Regular Expressions (regex)**: + Pros: Lightweight, flexible, and can be used to filter large datasets. + Cons: Can be slow for very large datasets due to the overhead of regex compilation. + Considerations: The performance of this approach depends on the complexity of the regex pattern and the size of the dataset. For small to medium-sized datasets, regex may be sufficient, but for larger datasets, Lodash's `intersection()` function might be faster. * **Lodash Intersection**: + Pros: Optimized for large datasets, uses optimized algorithms, and is highly performant. + Cons: Requires an external library (Lodash), adds overhead to the project. + Considerations: This approach is designed specifically for finding common elements between arrays. If this is a common operation in your project, using Lodash's `intersection()` function might be a good choice. **Library Used** The test case uses the Lodash library, which is a popular utility library for JavaScript that provides various functions for working with arrays, objects, and more. In this specific case, Lodash's `intersection()` function is used to find the common elements between the two input arrays. **Special JS Feature or Syntax** There are no special features or syntaxes mentioned in the test case, so I won't provide any additional explanation on that topic. **Other Alternatives** If you're looking for alternative libraries or approaches for finding common elements between arrays, some options include: * **Array.prototype.filter()**: This is a built-in method in modern JavaScript that can be used to filter an array based on a condition. * **lodash-es**: Lodash has a newer version called `lodash-es` that provides similar functionality without the additional dependencies of the original `lodash.min.js`. * **Underscore's `filter()`**: Similar to Lodash's `intersection()`, but uses Underscore's implementation for filtering arrays. Keep in mind that these alternatives may not be as performant as Lodash's optimized `intersection()` function, but they can still be useful if you don't need the extra features or performance of Lodash.
Related benchmarks:
Lodash vs Javascript Set Intersection
Lodash vs. Set Intersection foo123
Lodash vs. Set Intersection (1000000)
Lodash vs Javascript Regexp Intersection (Fix)
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