Benchmark: underscore first VS access

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.13.6/underscore-min.js" integrity="sha512-2V49R8ndaagCOnwmj8QnbT1Gz/rie17UouD9Re5WxbzRVUGoftCu5IuqqtAM9+UC3fwfHCSJR1hkzNQh/2wdtg==" crossorigin="anonymous" referrerpolicy="no-referrer"></script>

Script Preparation code:

var MyArray = [1,2,3]

var myCopy = null;

Tests:

underscore check
myCopy = _.first(MyArray);
native check
myCopy = MyArray[0]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
underscore check
native check

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 explain what is being tested, compared, and the pros/cons of different approaches.

**Benchmark Definition**

The benchmark is comparing two approaches to access the first element of an array: using the `underscore` library's `first()` function or directly accessing the first element of the array using native JavaScript.

**Options Compared**

1. **Native Access**: Directly accessing the first element of the array using `MyArray[0]`.
	* Pros:
		+ Fast and efficient, as it avoids the overhead of a function call.
		+ Often faster than using libraries or frameworks.
	* Cons:
		+ May not work correctly for all types of arrays (e.g., arrays with non-numeric indices).
2. **Underscore Library**: Using the `underscore` library's `first()` function to access the first element of the array.

**Library: Underscore.js**

The underscore library is a popular JavaScript utility library that provides functional programming helpers, including array manipulation functions like `first()`. The library is designed to be fast and efficient while still providing a convenient way to perform common tasks without having to write custom code.

**Special JS Feature or Syntax: None**

There are no special JavaScript features or syntax used in this benchmark. It's purely a comparison of two different approaches to access an array element.

**Benchmark Preparation Code**

The preparation code is simple and only sets up the necessary variables:
```javascript
var MyArray = [1,2,3];
var myCopy = null;
```
It creates an array `MyArray` with three elements and initializes a variable `myCopy` to `null`.

**HTML Preparation Code**

The HTML preparation code includes a script tag that loads the underscore library from a CDN:
```html
<script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.13.6/underscore-min.js" integrity="sha512-2V49R8ndaagCOnwmj8QnbT1Gz/rie17UouD9Re5WxbzRVUGoftCu5IuqqtAM9+UC3fwfHCSJR1hkzNQh/2wdtg==\" crossorigin="anonymous" referrerpolicy="no-referrer"></script>
```
This library is used in the benchmark's script.

**Latest Benchmark Result**

The latest result shows two test runs:

1. **Native Check**: Executed 5878258 times per second on a Chrome 107 browser on a Linux desktop.
2. **Underscore Check**: Executed 3145148.75 times per second on a Chrome 107 browser on a Linux desktop.

**Other Alternatives**

If you want to try alternative approaches, you can modify the benchmark by changing the `Benchmark Definition` or using different libraries like Lodash or Array.prototype.slice(). Here's an example of how you could compare using Lodash:
```javascript
var MyArray = [1,2,3];
var myCopy = null;

// Benchmark: Using Lodash
benchmark('lodash check', () => {
  return _.first(MyArray);
}, true);

// Benchmark: Using Array.prototype.slice()
benchmark('slice check', () => {
  return MyArray.slice(0, 1)[0];
}, true);
```
These alternatives would allow you to compare the performance of different libraries or approaches in accessing array elements.

Related benchmarks:

underscore first VS access (version: 0)

Comparing performance of: underscore check vs native check

Created: 3 years ago by: Guest

Jump to the latest result

underscore check

native check

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):