Benchmark: Lodash.js vs Native test23

HTML Preparation code:

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

Script Preparation code:

var max2 = 1000000; 

var arr2 = [];
for (var i = 0; i <= max2; i++) { arr2.push({email: i}); }

sendtoAllbyRole = arr2
userEmail=[]

Tests:

Native
sendtoAllbyRole.forEach(user => { user.email && userEmail.push(user.email) })
Lodash.js filter
userEmail = _.map(_.filter(sendtoAllbyRole, (user) => user.id), 'id')

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

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 break down the provided benchmark and its test cases.

**Benchmark Overview**

The benchmark is designed to compare the performance of two approaches: native JavaScript and Lodash.js (a popular JavaScript utility library).

**Script Preparation Code**

The script preparation code creates an array `arr2` containing 1,000,000 objects with an `email` property. The code also defines a variable `sendtoAllbyRole` by assigning the entire array to it.

```javascript
var max2 = 1000000;
var arr2 = [];
for (var i = 0; i <= max2; i++) {
  arr2.push({ email: i });
}
sendtoAllbyRole = arr2;
userEmail = [];
```

**Html Preparation Code**

The HTML preparation code includes a script tag that loads the Lodash.js library version 4.17.4.

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

**Individual Test Cases**

There are two test cases:

1. **Native**
The first test case measures the performance of native JavaScript code that iterates over the `sendtoAllbyRole` array and pushes the `email` property to a separate array called `userEmail`.
```javascript
sendtoAllbyRole.forEach(user => {
  user.email && userEmail.push(user.email);
});
```
This test case is testing the performance of native JavaScript loops and conditional statements.

2. **Lodash.js filter**
The second test case measures the performance of Lodash.js code that uses the `_.filter()` function to filter the `sendtoAllbyRole` array based on a condition, and then maps the resulting filtered array to a new array called `userEmail`.
```javascript
userEmail = _.map(_.filter(sendtoAllbyRole, (user) => user.id), 'id');
```
This test case is testing the performance of Lodash.js functions, specifically `_filter()` and `_map()`, which are designed to improve code readability and maintainability.

**Library: Lodash.js**

Lodash.js is a popular JavaScript utility library that provides a wide range of functional programming helpers. The `_.filter()` and `_map()` functions are two examples of its capabilities. These functions are used in the second test case to filter and map arrays, respectively.

**Special JS Feature/Syntax: None mentioned**

There are no special JavaScript features or syntaxes used in this benchmark.

**Other Alternatives**

If you want to write a similar benchmark, here are some alternatives:

1. Use a different utility library like `underscore.js` or `moment.js`.
2. Create a custom implementation of the `_filter()` and `_map()` functions using native JavaScript.
3. Measure the performance of different loop constructs, such as `for...of`, `for...in`, or arrow functions.
4. Test the performance of array methods like `forEach()`, `some()`, or `every()`.

By understanding the benchmark's design and testing multiple approaches, you can gain insights into the performance characteristics of native JavaScript code versus popular utility libraries like Lodash.js.

Related benchmarks:

Lodash.js vs Native test23 (version: 0)

asd

Comparing performance of: Native vs Lodash.js filter

Created: 2 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):