Benchmark: Compare speed - MeasureThat.net

HTML Preparation code:

<div id="outer">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div id="inner">

</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>


<div id="outer2">
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div id="inner2">

</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>

Script Preparation code:

var inner = document.getElementById("inner");
var outer = document.getElementById("outer");

Tests:

contains() method
outer.contains(inner) === true
parrentElement
inner.parentElement === outer

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
contains() method
parrentElement

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 explain what's being tested, compared, and the pros/cons of each approach.

**Benchmark Definition**

The benchmark measures the speed of two JavaScript methods: `outer.contains(inner)` and `inner.parentElement === outer`. The script prepares the HTML structure by creating a nested div with an inner div inside it. The benchmark then checks if the inner div is contained within the outer div using both methods.

**Script Preparation Code**

The script preparation code retrieves two HTML elements: `outer` and `inner`, which are part of the nested div structure created in the HTML preparation code.

**Html Preparation Code**

The HTML preparation code creates a deeply nested div structure with multiple levels of nesting, including an inner div. This is done to test the performance of both methods on a complex HTML structure.

**Individual Test Cases**

There are two individual test cases:

1. **contains() method**: This test case measures the speed of the `outer.contains(inner)` method.
2. **parrentElement**: This test case measures the speed of the `inner.parentElement === outer` expression.

**Comparison**

The benchmark compares the performance of both methods on the same HTML structure.

**Options Compared**

1. **Using `contains()` method**: This method checks if the inner div is contained within the outer div by iterating over the DOM tree.
2. **Using `parrentElement === outer` expression**: This expression directly compares the parent element of the inner div with the outer div.

**Pros and Cons**

1. **Using `contains()` method**:
	* Pros: More accurate, as it checks for containment in a more comprehensive way.
	* Cons: Can be slower due to the iteration over the DOM tree.
2. **Using `parrentElement === outer` expression**:
	* Pros: Faster, as it directly compares two elements without iterating over the DOM tree.
	* Cons: May not accurately represent the containment relationship, especially in complex HTML structures.

**Libraries and Special JS Features**

There are no libraries used in this benchmark. However, the `contains()` method is a built-in JavaScript method that uses the `indexOf()` method internally to check for containment.

No special JS features or syntax are being tested in this benchmark.

**Alternatives**

Other alternatives could include:

1. **Using `querySelector` and `querySelectorAll` methods**: Instead of using `contains()`, you could use `querySelector` and `querySelectorAll` to select the inner div.
2. **Using a library like jQuery**: You could use jQuery's `contains()` method or other jQuery-specific selectors to compare containment relationships.
3. **Using a different expression**: You could try alternative expressions, such as using `element.matches()` or `element.contains()`, to see if they perform better.

Keep in mind that the performance differences between these alternatives may be negligible in most cases, and the benchmark results should be taken into context when evaluating their relevance to real-world use cases.

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/99.0.4844.51 Safari/537.36

Browser/OS: Chrome 99 on Windows

View result in a separate tab

Test name	Executions per second
contains() method	2272874.2 Ops/sec
parrentElement	3241635.5 Ops/sec

Related benchmarks:

Compare speed (version: 0)

Comparing performance of: contains() method vs parrentElement

Created: 2 years ago by: Guest

Jump to the latest result

contains() method

parrentElement

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):