Benchmark: Dom benchmark - MeasureThat.net

HTML Preparation code:

<div id="i1">
  <div id="i2">
    <div id="i4" class="c1">
      <div class="c5">
        <div class="c4">

        </div>
        <div class="c5">

        </div>
      </div>
    </div>
    <div class="c7">
      <div class="c6">

      </div>
    </div>
    <div id="i3" class="c2">
      <div class="c3">
        <div class="c4">
          <div class="c8">
            <span>
				Find me
            </span>
          </div>
        </div>
        <div class="c5">

        </div>
      </div>
    </div>
  </div>
</div>

Tests:

one-liner found
var r = function () { return document.getElementById('i3').querySelector('span'); }()
if breakout found
var r = function () { var e = document.getElementById('i3'); return e ? e.querySelector('span') : null; }()
one-liner not found
var r = function () { return document.getElementById('i4').querySelector('span'); }()
if breakout not found
var r = function () { var e = document.getElementById('i4'); return e ? e.querySelector('span') : null; }()
single found
var r = function () { return document.querySelector('span'); }()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
one-liner found
if breakout found
one-liner not found
if breakout not found
single found

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Measuring the performance of JavaScript code, specifically in terms of DOM manipulation, can be a complex task.

**Benchmark Definition JSON**

The provided JSON defines a benchmark named "Dom Benchmark" with a specific HTML structure. The script preparation code is empty, which means that no additional setup or initialization is required before running the benchmarks. The HTML preparation code generates the specified DOM structure using JavaScript, making it easy to analyze and compare different approaches.

**Individual Test Cases**

There are four individual test cases:

1. **One-liner found**: This test case checks if the span element can be accessed directly within a single line of code.
2. **If breakout found**: This test case checks if the span element can be accessed by first retrieving the parent element and then querying for the child element.
3. **One-liner not found**: Similar to the previous test, but with an additional step to check if the span element is actually present in the DOM structure.
4. **Single found**: This test case checks if a single query can access the span element without any unnecessary steps.

**Options Compared**

The main options being compared are:

* Direct access vs. retrieving parent and querying child
* Single query vs. multi-step approach

**Pros and Cons of Each Approach**

* **Direct access**:
	+ Pros: Fastest, most straightforward approach
	+ Cons: May not work if the span element is nested deep within the DOM structure or if it's dynamically generated
* **If breakout found**:
	+ Pros: More flexible for cases where the span element needs to be accessed through multiple levels of nesting
	+ Cons: Slower due to additional steps, may introduce overhead

**Library Usage**

There is no explicit library usage in the provided code. However, it's worth noting that `document.getElementById()` and `querySelector()` methods are part of the W3C DOM API.

**Special JS Feature or Syntax**

None mentioned explicitly, but the use of modern JavaScript syntax (e.g., arrow functions) suggests a focus on supporting recent JavaScript versions and best practices.

**Other Considerations**

* The benchmark uses Chrome 114 as the test browser, which may introduce some platform-specific considerations.
* The `ExecutionsPerSecond` metric provides insight into the performance differences between various approaches, but it's essential to consider other factors like CPU usage, memory allocation, and network overhead when interpreting these results.

**Alternatives**

For a more comprehensive understanding of DOM manipulation performance, you might want to explore alternative benchmarks or libraries that:

* Use different browsers or platforms
* Test specific use cases, such as rendering or animation
* Employ more advanced techniques, like requestAnimationFrame() or web workers
* Utilize modern JavaScript features, like async/await or Promises

Keep in mind that these alternatives may require significant modifications to the benchmark code and setup.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Windows

View result in a separate tab

Test name	Executions per second
one-liner found	2895933.5 Ops/sec
if breakout found	2579076.8 Ops/sec
one-liner not found	2580924.5 Ops/sec
if breakout not found	2267671.5 Ops/sec
single found	2530603.5 Ops/sec

Related benchmarks:

Dom benchmark (version: 0)

Comparing performance of: one-liner found vs if breakout found vs one-liner not found vs if breakout not found vs single found

Created: 7 years ago by: Guest

Jump to the latest result

one-liner found

if breakout found

one-liner not found

if breakout not found

single found

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):