Benchmark: Bob the Benchmark

HTML Preparation code:

<div><div id='foo' class='bar'><div></div></div></div>

Tests:

JQ by id
let v = $('#foo')
JQ by class
let v = $('.bar')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JQ by id
JQ by class

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition JSON**

The benchmark is defined using a JSON object that contains several key-value pairs:

* `Name`: The name of the benchmark, "Bob the Benchmark".
* `Description`: An empty string, indicating no description is available.
* `Script Preparation Code`: An empty string, indicating no script preparation code is required.
* `Html Preparation Code`: A string containing HTML code that will be used as a test case. In this case, it's a simple HTML structure with an id and a class.

**Individual Test Cases**

The benchmark consists of two individual test cases:

1. "JQ by id": This test case uses jQuery to select an element by its id.
2. "JQ by class": This test case uses jQuery to select an element by its class.

**Library: jQuery**

Both test cases rely on the jQuery library, which is a popular JavaScript library for DOM manipulation and event handling. In this context, jQuery is used to perform a simple DOM query, retrieving an element based on its id or class.

The `$('#foo')` syntax in the "JQ by id" test case selects the first element with the id "foo", while the `$('.bar')` syntax in the "JQ by class" test case selects all elements with the class "bar".

**Special JS Feature/Syntax: None**

There is no special JavaScript feature or syntax being tested in these benchmark cases. The focus is solely on measuring the performance of jQuery's DOM query functionality.

**Other Alternatives**

If you're interested in exploring alternative approaches to testing JavaScript performance, here are a few options:

1. **V8 Benchmark**: V8 is the JavaScript engine used by Google Chrome. The V8 Benchmark is a set of benchmarks that measure the performance of various JavaScript features and libraries.
2. **jsperf**: jsperf is an older benchmarking tool for measuring JavaScript performance. While it's no longer actively maintained, it can still be useful for exploring specific use cases.
3. **BenchPress.js**: BenchPress.js is a modern benchmarking framework that provides a simple way to write and run benchmarks for JavaScript libraries and frameworks.

**Pros and Cons of Each Approach**

Each benchmarking approach has its pros and cons:

* **MeasureThat.net**: Pros: Easy to use, well-maintained, and supports multiple browsers. Cons: May not be suitable for complex or large-scale applications.
* **V8 Benchmark**: Pros: Highly relevant to Chrome users, provides detailed results. Cons: Limited scope, may require expertise in V8's inner workings.
* **jsperf**: Pros: Simple to use, easy to write benchmarks. Cons: Outdated, may not be compatible with modern browsers.
* **BenchPress.js**: Pros: Modern, flexible, and customizable. Cons: Steeper learning curve, may require additional setup.

When choosing a benchmarking approach, consider the specific requirements of your project, such as the target browser or ecosystem, and select the tool that best aligns with those needs.

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 Safari/537.36

Browser/OS: Chrome 60 on Mac OS X 10.12.6

View result in a separate tab

Test name	Executions per second
JQ by id	955185.0 Ops/sec
JQ by class	566359.4 Ops/sec

Related benchmarks:

Bob the Benchmark (version: 0)

Comparing performance of: JQ by id vs JQ by class

Created: 7 years ago by: Guest

Jump to the latest result

JQ by id

JQ by class

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 27 days ago):