Benchmark: JQuery: test find by id and find by id and tag for non-document element

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js'></script>

Script Preparation code:

var element = $(`<div><a id="tr_1">
            <svg id="tr_2"></svg>
            <span id="tr_3"></span>
            <div id="tr_4">
            </div>
            </div>`);

Tests:

find by tag and id
element.find("a#tr_1"); element.find("svg#tr_2"); element.find("span#tr_3"); element.find("div#tr_4");
find by id
element.find("#tr_1"); element.find("#tr_2"); element.find("#tr_3"); element.find("#tr_4");
find by tag (if it possible)
element.find("a"); element.find("#tr_2"); element.find("span"); element.find("div");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
find by tag and id
find by id
find by tag (if it possible)

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

Browser/OS: Firefox 78 on Windows

View result in a separate tab

Test name	Executions per second
find by tag and id	34035.3 Ops/sec
find by id	33971.4 Ops/sec
find by tag (if it possible)	55427.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and test cases, explaining what's being tested, compared, and their pros and cons.

**Benchmark Definition:**
The website MeasureThat.net provides a JSON representation of a JavaScript microbenchmark. In this case, we have two benchmark definitions:

1. "JQuery: test find by id and find by id and tag for non-document element"
2. Three individual test cases:
	* "find by tag and id"
	* "find by id"
	* "find by tag (if it possible)"

**Script Preparation Code:**
The script preparation code is a JavaScript snippet that creates an HTML structure with multiple elements, each having a unique ID:

```javascript
var element = $(`<div><a id="tr_1"><svg id="tr_2"></svg><span id="tr_3"></span><div id="tr_4"></div></div>`);
```

This code uses jQuery to create the HTML structure and assign IDs to each element.

**Html Preparation Code:**
The html preparation code is a script tag that includes the jQuery library:

```html
<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js'></script>
```

This code includes the jQuery library, which is used in the script preparation code to create the HTML structure.

**Individual Test Cases:**
The three individual test cases measure the performance of different jQuery selector methods:

1. "find by tag and id":
```javascript
element.find("a"); element.find("#tr_2"); element.find("span"); element.find("div");
```

This test case compares the performance of using a tag name (`"a"`) with an ID (`"#tr_2"`), as well as the performance of finding elements by their type (tag, in this case).

**Pros and Cons:**

* Using a tag name (`"a"`) has the advantage of being faster because it allows jQuery to use a simple DOM traversal algorithm. However, it may not work for non-element tags.
* Using an ID (`"#tr_2"`), on the other hand, is more specific and reliable but can be slower due to the need to query the DOM tree.

**Library:**
The library used in this benchmark is jQuery, a popular JavaScript library for DOM manipulation and event handling. The `$(` and `)` symbols are used to wrap the HTML code and execute it as JavaScript.

**Special JS Feature or Syntax:**
There are no special JavaScript features or syntaxes mentioned in the benchmark definition. The focus is on measuring the performance of different jQuery selector methods.

**Other Alternatives:**

* Vanilla JavaScript (without jQuery): The test cases could be rewritten using vanilla JavaScript, which would eliminate the need for the jQuery library.
* Other DOM traversal libraries or frameworks, such as React or Angular, may also have optimized selectors or traversal algorithms that could affect performance.
* Custom-built query engines or algorithms could potentially outperform jQuery's selector methods.

In summary, this benchmark tests the performance of different jQuery selector methods, comparing the use of tag names with IDs. The results can help identify which approach is faster and more reliable for specific use cases.

Related benchmarks:

JQuery: test find by id and find by id and tag for non-document element (version: 0)

check which selector is better for non-document element

Comparing performance of: find by tag and id vs find by id vs find by tag (if it possible)

Created: 4 years ago by: Guest

Jump to the latest result

find by tag and id

find by id

find by tag (if it possible)

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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