Benchmark: Check if in DOM - MeasureThat.net

HTML Preparation code:

<div id="a">
<div id="b">
  <div id="c">
Test
    </div>
</div>
</div>

Script Preparation code:

var c = document.getElementById('c');
document.getElementById('b').innerHTML = '';

Tests:

parentNode
c.parentNode;
nextSibling
c.nextSibling;
parentElement
c.parentElement;
previousSibling
c.previousSibling;
getElementById
document.getElementById('c');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
parentNode
nextSibling
parentElement
previousSibling
getElementById

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

I'd be happy to explain what's being tested in the provided JSON.

**Benchmark Definition**

The benchmark definition is a JSON object that represents the test case. It contains the following information:

* `Name`: A unique name for the benchmark (in this case, "Check if in DOM").
* `Description`: An optional description of the benchmark.
* `Script Preparation Code`: A script that is run before each execution of the benchmark to prepare the environment. In this case, it assigns a variable `c` to an HTML element with id "c".
* `Html Preparation Code`: The HTML code that is used to create the DOM tree for the benchmark.

**Individual Test Cases**

The individual test cases are represented as JSON arrays, each containing:

* `Benchmark Definition`: A string that represents the JavaScript expression being tested. In this case, it's a series of expressions that test different methods for accessing elements in the DOM (e.g., `c.parentNode`, `c.nextSibling`, etc.).

These expressions are being tested to measure their performance and determine which one is the fastest.

**Libraries Used**

In some cases, specific libraries or APIs are used to access the DOM. For example:

* In the test case for `getElementById`, a library function `document.getElementById` is used to access an element by its id.
* The expressions `c.parentNode`, `c.nextSibling`, and `c.parentElement` rely on the built-in DOM API.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax being tested in this benchmark. All of the expressions are standard JavaScript methods for accessing elements in the DOM.

**Pros and Cons of Different Approaches**

The choice between different approaches to accessing elements in the DOM can have significant performance implications. Here are some pros and cons of each approach:

* `document.getElementById`:
	+ Pros: Widely supported, easy to use.
	+ Cons: Can be slower than other methods, especially for complex queries.
* `c.parentNode`, `c.nextSibling`, and `c.parentElement`:
	+ Pros: Fast, lightweight.
	+ Cons: May not work in all browsers or cases (e.g., if the element has no parent or next sibling).

**Other Alternatives**

If you were to implement a new benchmarking framework for accessing elements in the DOM, some alternative approaches you might consider include:

* Using a query API like `querySelector` or `querySelectorAll`, which can be more expressive than traditional methods but may also introduce additional overhead.
* Implementing a custom indexing system for accessing elements by their IDs or other attributes.
* Profiling different libraries or APIs that provide DOM access, such as jQuery or React.

Overall, the choice of approach will depend on your specific use case and performance requirements.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/105.0.0.0 Safari/537.36

Browser/OS: Chrome 105 on Windows

View result in a separate tab

Test name	Executions per second
parentNode	3615515.2 Ops/sec
nextSibling	4140719.5 Ops/sec
parentElement	3970796.0 Ops/sec
previousSibling	4037527.8 Ops/sec
getElementById	1125314.4 Ops/sec

Related benchmarks:

Check if in DOM (version: 0)

Comparing performance of: parentNode vs nextSibling vs parentElement vs previousSibling vs getElementById

Created: 7 years ago by: Guest

Jump to the latest result

parentNode

nextSibling

parentElement

previousSibling

getElementById

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):