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_.first() vs spread
(version: 0)
Comparing performance of:
_.first vs spread
Created:
5 years ago
by:
Guest
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HTML Preparation code:
<script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.core.js"></script>
Tests:
_.first
const names = ["first", "middle", "last", "suffix"] _.first(names)
spread
const names = ["first", "middle", "last", "suffix"] const [firstName, ...otherNames] = names
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
_.first
spread
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 what's being tested on MeasureThat.net. **Benchmark Definition and Script Preparation Code** The benchmark is comparing the performance of two approaches: using the `_.first()` method from the Lodash library, and using the spread operator (`...`) to achieve a similar result. The Lodash library is used for functional programming tasks in JavaScript. **Options Compared** The two options being compared are: 1. **Lodash _.first()**: This method takes an array as input and returns the first element of that array. 2. **Spread Operator (`...`)**: This operator can be used to extract a single value from an array, where the first value is extracted. **Pros and Cons** * **Lodash _.first()**: + Pros: Simple, concise syntax; well-documented and widely supported in JavaScript libraries and frameworks. + Cons: Adds an external dependency (Lodash) which may not be necessary for all use cases. * **Spread Operator (`...`)**: + Pros: Lightweight, no external dependencies required; can be used with any array type. + Cons: May require more code to achieve the desired result. **Library and Purpose** The Lodash library is a popular JavaScript utility library that provides functional programming tools. In this case, `_.first()` is a method provided by Lodash for working with arrays. **Special JS Feature or Syntax** There isn't any special JavaScript feature or syntax being tested in this benchmark. The test focuses on the performance comparison of two basic approaches to extracting the first element from an array. **Other Alternatives** If you don't want to use the spread operator, other alternatives for extracting the first element from an array include: * `Array.prototype[0]`: This is a built-in method that returns the first element of an array. * `Math.max(...array) === undefined ? ... : Math.max(array)[1]`: This is a more complex approach that uses `Math.max()` to find the maximum value in the array, and then extracts the second value. However, these alternatives are not as concise or lightweight as using the spread operator (`...`). I hope this explanation helps!
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