Benchmark: Lodash.js vs Native false v2

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

var max1 = 100000; // 100,000 (100 Thousand)
var max2 = 10000000; // 10,000,000 (10 Million)
var max3 = 100000000; // 100,000,000 (100 Million)

var arr1 = [];
//for (var i = 0; i <= max1; i++) { arr1.push(i); }

var arr2 = [];
for (var i = 0; i <= max2; i++) { arr2.push(i); }

var arr3 = [];
//for (var i = 0; i <= max3; i++) { arr3.push(i); }

Tests:

Native
arr2.forEach(function (element, index) { element = element*2; return false });
Lodash.js filter
_.each(arr2, function (element, index) { element = element*2; return false });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Native
Lodash.js filter

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, the different approaches compared, their pros and cons, and other considerations.

**Benchmark Overview**

The benchmark is designed to compare two approaches for iterating over an array in JavaScript:

1. Native JavaScript `forEach` loop
2. Lodash.js `_each` function

The test cases are created using a template literal that defines an array `arr2` with 10 million elements, and then applies the `forEach` loop or `_each` function to iterate over the array, performing a simple operation on each element (doubling it).

**Native JavaScript `forEach` Loop**

The Native JavaScript `forEach` loop is a built-in method that allows iterating over an array using a callback function. The pros of this approach are:

* It's a standard part of the JavaScript language, so it's likely to be supported by most browsers and environments.
* It's often faster than other approaches because it's optimized for performance.

However, there are some cons to consider:

* The `forEach` loop can be less efficient than other methods when dealing with large arrays, as it creates a new array copy of the original elements.
* In modern JavaScript, `forEach` loops are often used in combination with other methods, which can affect performance.

**Lodash.js `_each` Function**

The Lodash.js `_each` function is a utility function that provides an alternative way to iterate over arrays. The pros of this approach are:

* It's often more concise and readable than the `forEach` loop.
* It allows for more control over the iteration process, as it takes an optional callback function.

However, there are some cons to consider:

* Lodash.js is a third-party library, which means it adds extra overhead and may not be supported by all environments.
* The `_each` function can be slower than the `forEach` loop due to the overhead of calling a separate function.

**Comparison**

The benchmark compares the performance of these two approaches using different test cases:

1. "Native" (using the JavaScript `forEach` loop)
2. "Lodash.js filter" (using the Lodash.js `_each` function)

The results show that the Native JavaScript `forEach` loop is generally faster than the Lodash.js `_each` function, especially for larger arrays.

**Other Considerations**

* **Browser support**: Both approaches are supported by modern browsers, but it's essential to test them on different environments to ensure compatibility.
* **Performance optimization**: When dealing with large datasets, consider using techniques like caching or parallel processing to optimize performance.
* **Code readability and maintainability**: While the `forEach` loop can be more concise, the `_each` function provides more control over the iteration process. Choose the approach that best suits your specific use case.

**Alternatives**

Other alternatives for iterating over arrays in JavaScript include:

1. For...of loop: A modern JavaScript loop that allows iterating over arrays using a `for...of` statement.
2. Array.prototype.map(): A method that creates a new array with transformed elements, which can be faster than the `forEach` loop for some use cases.

In summary, the benchmark highlights the trade-offs between native JavaScript `forEach` loops and third-party libraries like Lodash.js `_each`. While Native JavaScript is often faster, it's essential to consider code readability, maintainability, and compatibility when choosing an approach.

Related benchmarks:

Lodash.js vs Native false v2 (version: 0)

Comparing performance of: Native vs Lodash.js filter

Created: 6 years ago by: Guest

Jump to the latest result

Native

Lodash.js filter

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):