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lodash forEach vs native for and forEach - for loop not accessing the element
(version: 0)
Comparing performance of:
lodash.forEach vs native for vs native forEach
Created:
4 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<script src="https://cdn.jsdelivr.net/lodash/4.17.15/lodash.min.js"></script>
Script Preparation code:
var arr = new Array(1000).fill(0);
Tests:
lodash.forEach
let count = 0; _.forEach(arr, (v,i) => { })
native for
let count = 0; for (let i = 0; i < arr.length; i++) { count++; }
native forEach
let count = 0; arr.forEach((v,i) => { count++; })
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
lodash.forEach
native for
native forEach
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 Overview** The benchmark is comparing three approaches: 1. Lodash's `forEach` function 2. The native `for...of` loop (not `for...in`) with `forEach` 3. A traditional `for` loop These approaches are compared in the context of a simple array iteration, where each element is accessed and incremented. **Library: Lodash** Lodash is a popular JavaScript utility library that provides a wide range of functions for various tasks, including array manipulation. The `forEach` function is one such utility that iterates over an array, executing a provided callback function for each element. In this benchmark, the `forEach` function from Lodash is being compared to the native `for...of` loop and traditional `for` loop. **Native `for...of` Loop vs Traditional `for` Loop** The native `for...of` loop is a relatively new feature in JavaScript (introduced in ECMAScript 2015) that allows iterating over arrays using a more concise syntax. The loop iterates over the array's elements, returning both the current element and its index. In contrast, traditional `for` loops require explicit indexing, which can lead to off-by-one errors if not handled carefully. The benchmark is comparing the performance of these two approaches, with the native `for...of` loop likely offering better performance due to its concise syntax and optimized engine implementation. **Benchmark Results** The latest benchmark results show that: * The native `forEach` function (not just a simple `forEach`, but an actual implementation that iterates over the array) outperforms both Lodash's `forEach` and traditional `for` loop by a significant margin. * Lodash's `forEach` is faster than the traditional `for` loop, likely due to its optimized engine implementation. **Other Alternatives** If you're looking for alternative approaches, consider: * Using `Array.prototype.forEach()` (a simpler variant of Lodash's `forEach`) * Implementing your own custom iteration logic using recursion or a queue-based approach Keep in mind that performance differences between these approaches may be negligible for small arrays or simple use cases. However, as the array size increases or the iteration becomes more complex, the native `for...of` loop and optimized libraries like Lodash's `forEach` may offer significant performance advantages.
Related benchmarks:
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lodash _.forEach vs native Array.prototype.forEach
native for loop vs Array.prototype.forEach vs lodash forEach
lodash vs nativejs foreach
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