Benchmark: Find vs select - MeasureThat.net

HTML Preparation code:

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div>
<div class="div1"><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><h1>H1</h1><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><span>stuff</span><h2>h2</h1></div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div><div>stuff</div>

Tests:

select
$(".div1 h2"); $(".div1 h3");
find
var $div = $('.div1'); $div.find('h2'); $div.find('h3');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
select
find

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 24 days ago):

LLMs can make mistakes. Check important info.

I'll break down the test cases and explain what's being tested, comparing different approaches, their pros and cons, and other considerations.

**Benchmark Context**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark in question compares the performance of two methods: `select` and `find`.

**Script Preparation Code**

The script preparation code includes an external jQuery library reference, which is used by both test cases. This library provides functions for selecting elements on the page.

```html
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
```

**Individual Test Cases**

There are two test cases:

### 1. `select` Test Case

The first test case uses the `$("selector")` syntax to select an element on the page.

```javascript
$(".div1 h2");
$(".div1 h3");
```

This approach is specific to jQuery, a popular JavaScript library for DOM manipulation.

**Pros:**

* Fast and efficient, as jQuery has optimized selection algorithms.
* Easy to read and write, especially for developers familiar with jQuery syntax.

**Cons:**

* Requires the presence of the jQuery library on the page.
* May not be suitable for projects that don't use jQuery or prefer other DOM manipulation approaches.

### 2. `find` Test Case

The second test case uses a vanilla JavaScript approach to find elements on the page.

```javascript
var $div = $('.div1');
$div.find('h2');
$div.find('h3');
```

This approach relies on the `document.querySelector()` method, which is part of the modern web platform ( ECMAScript 2015+).

**Pros:**

* Can be used in projects that don't use jQuery or prefer other DOM manipulation approaches.
* Provides more control over the selection process.

**Cons:**

* May not be as fast or efficient as the `select` approach, as it requires parsing the CSS selector string and traversing the DOM tree.
* Requires modern browsers or environments that support `document.querySelector()`.

**Library: jQuery**

jQuery is a popular JavaScript library for DOM manipulation. It provides functions like `$()`, `.find()`, and `.on()` for selecting and manipulating elements on the page. The library also offers various utility methods, such as `.trim()`, `.html()`, and `.text()`, for working with HTML content.

**Special JS Feature: No special features are used in this benchmark**

No additional JavaScript features or syntax are being tested beyond vanilla JavaScript and jQuery.

Latest run results:

Run details: (Test run date: 7 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/57.0.2987.98 Safari/537.36 OPR/44.0.2510.857

Browser/OS: Opera 44 on Windows

View result in a separate tab

Test name	Executions per second
select	38131.2 Ops/sec
find	177466.9 Ops/sec

Related benchmarks:

Find vs select (version: 0)

Comparing performance of: select vs find

Created: 7 years ago by: Guest

Jump to the latest result

select

find

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 24 days ago):