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forEach vs lodash.map vs map
(version: 0)
Comparing performance of:
forEach vs Lodash map vs map
Created:
7 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>
Tests:
forEach
var params = [ "hello", "hello", "sname" ]; var other = params.forEach((o, i) => console.log(o, i))
Lodash map
var params = [ "hello", "hello", "sname" ]; var other = _.map(params, (o, i) => console.log(o, i))
map
var params = [ "hello", "hello", "sname" ]; var other = params.map((o, i) => console.log(o, i))
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
forEach
Lodash map
map
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. **Benchmark Definition** The benchmark is comparing three different approaches to iterate over an array: `forEach`, `lodash.map`, and native `map`. **What's being compared?** * The `forEach` method iterates over the array using a callback function, where each element in the array is passed along with its index. * The `_` library (specifically, `_.map`) provides a mapping function that takes an array and returns a new array with the results of applying a given function to each element. * The native `map` method also iterates over the array using a callback function, similar to `forEach`. **Options being compared** The benchmark is comparing the execution speed of these three approaches: 1. `forEach`: Iterates over the array using a callback function. 2. `_lodash.map`: Uses the mapping function from the Lodash library to iterate over the array. 3. Native `map`: Iterates over the array using a callback function, similar to `forEach`. **Pros and cons of each approach** * **`forEach`**: Pros: Simple, widely supported, and easy to use. Cons: Can be slower than native methods due to the overhead of calling a function on each element. * **_lodash.map`: Pros: Provides a more concise and expressive way to iterate over arrays, especially for large datasets. Cons: Requires loading an external library, which can add overhead. * **Native `map`**: Pros: Fastest and most efficient way to iterate over arrays in modern JavaScript engines. Cons: May not be as readable or intuitive as the other approaches. **Library used** The `_lodash.map` function is part of the Lodash library, a popular utility library for functional programming in JavaScript. The Lodash library provides a wide range of functions for tasks such as array manipulation, string manipulation, and more. **Special JS feature or syntax** None mentioned in this benchmark definition. **Other alternatives** If you're looking for alternative approaches to iterate over arrays in JavaScript: * **`for...of` loop**: A modern, concise way to iterate over arrays using a `for...of` loop. * **`Array.prototype.reduce()`**: Another powerful method for reducing an array to a single value. In this benchmark, the native `map` method appears to be the fastest approach, followed by `_lodash.map`, and then `forEach`. However, the results may vary depending on the specific use case and JavaScript engine being used.
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