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Lodash groupBy replace test
(version: 0)
Comparing performance of:
Lodash vs Native
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>
Tests:
Lodash
var grouped = _.groupBy(['one', 'two', 'three'], 'length') console.log(grouped)
Native
var grouped = ['one', 'two', 'three'].reduce((r, v, i, a, k = v.length) => ((r[k] || (r[k] = [])).push(v), r), {}) console.log(grouped)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Lodash
Native
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the benchmark and explore what's being tested, the options compared, their pros and cons, and other considerations. **Benchmark Overview** The benchmark compares two approaches to implementing grouping functionality in JavaScript: 1. **Lodash**: Using the popular utility library Lodash to perform grouping. 2. **Native implementation**: Implementing grouping from scratch using native JavaScript features. **What's being tested?** * How fast is each approach at performing grouping operations? * Do different browsers and platforms favor one approach over the other? **Options compared** 1. **Lodash**: * Pros: Lodash provides a well-tested, widely-used library for utility functions, including grouping. * Cons: Using an external library might introduce additional overhead due to loading and parsing the code. 2. **Native implementation**: * Pros: This approach avoids external libraries, reducing overhead, but requires manual implementation of the grouping algorithm. * Cons: The implementation must be correct and efficient, which can be a challenge. **Other considerations** * **Browser support**: Both approaches should work across different browsers, but Lodash might provide better support for older or less-supported browsers. * **Performance overhead**: Using an external library like Lodash might introduce performance overhead due to the loading of the library's code. **Library: Lodash** Lodash is a popular JavaScript utility library that provides a comprehensive set of functions for various tasks, including data manipulation, string manipulation, and more. The `groupBy` function is part of Lodash's `moreUtils` module, which allows you to group elements by a specific property or key. **Special JS feature: Array.prototype.reduce** The second test case uses the `Array.prototype.reduce()` method to implement grouping. This method applies a reduction operation to an array, accumulating values as it iterates through the array. In this context, `reduce()` is used to iterate through the input array and accumulate grouped elements in an object. The callback function takes four arguments: `r` (the accumulator), `v` (the current element), `i` (the index of the current element), and `a` (the array itself). The `k` variable is a shortcut for `v.length`, which represents the length of the current element. **Benchmark Result** The benchmark results show that the native implementation outperforms Lodash in terms of executions per second, with Firefox 76 running at approximately 76284.78 executions per second on a Desktop Mac OS X 10.14 platform. Other alternatives to consider: * **Underscore.js**: Another popular utility library that provides grouping functionality. * **JavaScript built-in functions**: Using native JavaScript functions like `map()`, `forEach()`, and `reduce()` for grouping, without relying on libraries. * **Third-party libraries**: Other libraries, such as Ramda or Loom, provide grouping functionality with their own implementation. These alternatives can be explored to compare performance and see if they offer better optimizations or handling of specific use cases.
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