Benchmark: benchmarkname-11231234

HTML Preparation code:

<!DOCTYPE html>
<html>
<head>
</head>
<body>
  <div id="elma"></div>
</body>
</html>

Tests:

byId
var elma = document.getElementById("elma");
body.qs
var elma = document.body.querySelector("#elma");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
byId
body.qs

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and its options.

**Benchmark Description**

The benchmark is designed to measure the performance of two different approaches for selecting an HTML element by ID in JavaScript:

1. `byId`: This approach uses the `document.getElementById()` method, which returns the first element with the specified ID.
2. `body.qs`: This approach uses a non-standard property access syntax (`body.qs`) to select the element.

**Options Compared**

The two options being compared are:

* `document.getElementById()`
* `body.qs` (non-standard property access syntax)

**Pros and Cons of Each Approach**

1. `document.getElementById()`:
	* Pros:
		+ Widely supported across browsers and devices
		+ Well-documented and widely used
	* Cons:
		+ May be slower than other approaches, especially for elements with many siblings or complex DOM structures
2. `body.qs` (non-standard property access syntax):
	* Pros:
		+ May be faster due to being a single property access operation instead of a function call
	* Cons:
		+ Not supported by all browsers and devices, including older versions of Chrome and Firefox
		+ Less widely understood and used, which may lead to more errors and inconsistencies

**Library/Tool Used**

None explicitly mentioned in the provided JSON data.

**Special JS Features/Syntax**

The `body.qs` syntax is a non-standard property access syntax that is not officially supported by JavaScript. It's not a standard feature and should be avoided unless you're working with a specific library or framework that supports it.

**Other Considerations**

When measuring the performance of these two approaches, consider the following:

* **Browser and Device Support**: Ensure that the benchmark is run on various browsers and devices to get accurate results.
* **DOM Structure Complexity**: The complexity of the DOM structure can significantly impact performance. Run the benchmark with a simple and complex DOM structure to see how it affects the results.
* **Cache and Reuse**: If possible, consider caching or reusing elements to reduce the number of times `document.getElementById()` is called.

**Alternatives**

Other approaches for selecting an HTML element by ID include:

* `querySelector` (a more modern alternative to `getElementById`)
* `getElementsByClassName` (for multiple elements with the same class)
* Using a CSS selector library like Sizzle or PureCSS

Keep in mind that these alternatives may have different performance characteristics and should be tested accordingly.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 119 on Android

View result in a separate tab

Test name	Executions per second
byId	1662941.2 Ops/sec
body.qs	1204247.1 Ops/sec

Related benchmarks:

benchmarkname-11231234 (version: 0)

Comparing performance of: byId vs body.qs

Created: one year ago by: Guest

Jump to the latest result

byId

body.qs

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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