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lodash _.includes vs regex
(version: 0)
Comparing performance of:
_.includes vs regex
Created:
3 years ago
by:
Registered User
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HTML Preparation code:
<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.21/lodash.min.js"></script>
Tests:
_.includes
var output = _.includes('lodash begins me','lodash'); console.log(output);
regex
var output = 'lodash begins me'.match(/^lodash/); console.log(output);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
_.includes
regex
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. **What is being tested?** MeasureThat.net is testing two different approaches for checking if a string contains a specific substring: using the Lodash library (`_.includes`) versus a regular expression (`regex`). **Options compared** There are only two options being compared: 1. **Lodash _.includes**: This function checks if a value exists in an array or returns `true` if the specified element is found at the specified index, but it's used here to check for substring presence. 2. **Regular Expression (`regex`)**: A string matching pattern is used to search for a specific substring. **Pros and Cons** **Lodash _.includes:** Pros: * Simplified code (less boilerplate) * Less error-prone * Easier to maintain Cons: * May have slower performance due to function call overhead * Requires an additional library dependency **Regular Expression (`regex`):** Pros: * Potential for better performance, as it's a native JavaScript functionality * No additional library dependencies required Cons: * More complex code (more boilerplate) * Error-prone if not implemented correctly * May require more maintenance **Library: Lodash** Lodash is a popular JavaScript utility library that provides a lot of functional programming helpers. In this case, the `_.includes` function is used to check for substring presence. **Special JS feature/Syntax** None mentioned in the provided benchmark. However, keep in mind that MeasureThat.net might test other features or syntax in their benchmarks. **Other alternatives** For checking substring presence, you could also consider using other libraries like: * **String.prototype.includes()**: This is a built-in JavaScript method for checking if a string contains a specific substring. * **Array.prototype.some()**: This can be used with an array of strings to check for any matches. However, these alternatives might not provide the same level of performance as regular expressions or optimized libraries like Lodash. I hope this explanation helps software engineers understand what's being tested in the benchmark!
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