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Lodash concat vs spread v2
(version: 0)
Comparing performance of:
Lodash vs Spread
Created:
3 years ago
by:
Guest
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HTML Preparation code:
<script src='https://cdn.jsdelivr.net/npm/lodash@4.17.10/lodash.min.js'></script>
Tests:
Lodash
var l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; var p = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return _.concat(l, p);
Spread
var p = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; var l = [1, 2, 3, 4, 5, 6, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7]; return [...l, ...p];
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Lodash
Spread
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the provided benchmark and explain what's being tested. **Benchmark Definition:** The benchmark compares two approaches to concatenate arrays in JavaScript: 1. **Lodash (`.concat()` method)**: The first test case uses the `_` object from the Lodash library to concatenate two arrays using the `concat()` method. 2. **Spread Operator (`...`)**: The second test case uses the spread operator (`...`) to concatenate two arrays. **Options being compared:** * Two approaches are being compared: + Lodash with the `concat()` method + Spread operator (a built-in JavaScript feature) **Pros and Cons of each approach:** **Lodash with `concat()` method:** Pros: * Robustness: Lodash provides a reliable way to concatenate arrays, handling edge cases such as null or undefined values. * Performance: The `concat()` method is often optimized for performance. Cons: * Overhead: Using an external library like Lodash may introduce additional overhead due to the need to load and initialize the library. * Size: Including an extra 100KB of code (Lodash) may affect page load times or storage requirements. **Spread Operator (`...`):** Pros: * Lightweight: The spread operator is a built-in JavaScript feature, making it a lightweight option with minimal overhead. * Familiarity: Most developers are already familiar with the spread operator and its syntax. Cons: * Performance: The spread operator can be slower than the `concat()` method for very large arrays, as it involves creating new intermediate arrays. * Edge cases: The spread operator may not handle edge cases such as null or undefined values correctly, requiring additional error handling. **Library (Lodash) and its purpose:** Lodash is a popular JavaScript utility library that provides a wide range of functions to simplify common tasks. In this case, the `concat()` method is used to concatenate two arrays. **Special JS feature/Syntax:** There are no special JavaScript features or syntaxes being tested in these benchmarks. The focus is on comparing two established methods (Lodash's `concat()` and the spread operator) for array concatenation. **Other alternatives:** If you need to concatenate arrays, other alternatives to Lodash's `concat()` method include: * Using the `Array.prototype.concat()` method directly * Implementing a custom concatenation function using loops or recursive functions However, these alternatives may not offer the same level of performance or robustness as Lodash's implementation. Keep in mind that benchmark results may vary depending on specific use cases, JavaScript versions, and environments.
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