Benchmark: Lodash-for-forEach perf test

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.11/lodash.min.js'></script>

Script Preparation code:

var num = 1000000;
var sum = 0;
var arr = [];
for (var i = 1; i <= num; i++) { 
	arr.push(i); 
}

Tests:

Lodash
_.each(arr, function (val) { sum += val; });
for
for (var j = 1; j <= arr.length; j++) { sum += j; }
forEach
arr.forEach(function (val) { sum += val; });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Lodash
for
forEach

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

LLMs can make mistakes. Check important info.

Let's dive into the benchmark and explore what's being tested.

**Benchmark Overview**

The benchmark is designed to compare the performance of three different approaches for iterating over an array: `_.each`, `for`, and `forEach`. The test is using Lodash, a popular JavaScript utility library, as part of the benchmarking framework.

**Options Compared**

Here are the options being compared:

1. **Lodash's _.each**: This method takes an array and a callback function as arguments. It iterates over the array, executing the callback for each element.
2. **Classic `for` loop**: A traditional `for` loop is used to iterate over the array, incrementing a counter variable (`j`) until it reaches the length of the array.
3. **Array's built-in `forEach` method**: This method is part of the ECMAScript standard and allows iterating over an array using a callback function.

**Pros and Cons**

Here are some pros and cons for each approach:

1. **Lodash's _.each**:
	* Pros: Easy to use, flexible (can handle nested arrays), and provides additional features like stopping iteration on falsey values.
	* Cons: Requires Lodash library to be loaded, adds overhead due to the library itself.
2. **Classic `for` loop**:
	* Pros: Lightweight, doesn't require any libraries or frameworks.
	* Cons: Can be error-prone, especially for complex iterations; requires manual index management.
3. **Array's built-in `forEach` method**:
	* Pros: Simple to use, optimized for performance, and doesn't require any libraries or frameworks.
	* Cons: Not supported in older browsers (before Chrome 42), may not be as flexible as _.each.

**Library Used**

In this benchmark, Lodash is used as a utility library. The `_.each` method is part of the Lodash library, which provides a convenient way to iterate over arrays with a callback function.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark. All three approaches use standard JavaScript constructs.

**Other Alternatives**

If you're interested in exploring other alternatives for iterating over arrays, here are some options:

1. **`forEach` method with a custom function**: You can define a custom function using an arrow function (`() => { ... }`) and pass it to the `forEach` method.
2. **Reduce method**: The `reduce` method is another array method that allows iterating over an array, but in a different way (by accumulating values).
3. **Map and callback function**: You can use the `map` method to transform an array and then iterate over the resulting array using a callback function.

Keep in mind that each of these alternatives has its own trade-offs and might be better suited for specific use cases.

Related benchmarks:

Lodash-for-forEach perf test (version: 0)

Comparing performance of: Lodash vs for vs forEach

Created: 6 years ago by: Guest

Jump to the latest result

Lodash

for

forEach

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):