Benchmark: contains vs closest1

HTML Preparation code:

<div id='div1'>
  <div id='div2'>
    <div id='div3'>
    </div>
  </div>
</div>

Tests:

contains
const box = document.getElementById('div1') const clicked = document.getElementById('div3') const isClickInside = box.contains(clicked); return isClickInside
closest
const clicked = document.getElementById('div3') const isClickInside = clicked.closest('#div1'); return isClickInside

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
contains
closest

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark definition and individual test cases to understand what is being tested.

**Benchmark Definition**

The benchmark defines two test cases: "contains" and "closest". The scripts for these tests are embedded in the benchmark definition JSON.

**Test Cases**

1. **contains**
	* The script retrieves three elements using `document.getElementById`: `box`, `clicked`, and a container element.
	* It then checks if `clicked` is contained within `box` using the `contains()` method.
	* The test returns a boolean value indicating whether `clicked` is inside `box`.
2. **closest**
	* The script retrieves two elements: `clicked` (which points to the innermost element) and `container` (which points to the outermost element).
	* It then uses the `closest()` method on `clicked` to find the nearest ancestor that matches the CSS selector `#div1`.
	* The test returns a boolean value indicating whether `clicked` is inside the container with the ID `div1`.

**Library and Purpose**

In both tests, JavaScript's built-in `Element.prototype.contains()` and `Element.prototype.closest()` methods are used. These methods are part of the DOM API, which allows for dynamic interaction with web pages.

* `contains()`: This method checks if an element is a descendant of another element.
* `closest()`: This method returns the nearest ancestor that matches a given CSS selector or string value. In this case, it's used to find the container element with the ID `div1`.

**Pros and Cons**

Here are some pros and cons for each approach:

* **contains()**
	+ Pros:
		- Simple and efficient.
		- Works well for simple cases where only one ancestor is involved.
	+ Cons:
		- May not work correctly if there are multiple ancestors with the same selector.
		- Can be slower than `closest()` for more complex DOM structures.
* **closest()**
	+ Pros:
		- More flexible and accurate, especially when dealing with complex DOM structures.
		- Faster in many cases due to its ability to use CSS selectors.
	+ Cons:
		- Requires a valid CSS selector or string value, which can be more error-prone.

**Other Considerations**

When choosing between `contains()` and `closest()`, consider the following:

* How complex is your DOM structure?
* Are you working with simple or nested elements?
* Do you need to perform multiple ancestor checks?

If you're dealing with a simple case where only one ancestor is involved, `contains()` might be sufficient. However, if you're working with more complex DOM structures or need to perform multiple ancestor checks, `closest()` is likely a better choice.

**Alternatives**

Other alternatives for this type of benchmarking could involve:

* Using other methods, such as `contains()`, but with different implementations (e.g., using a CSS selector instead of an ID).
* Incorporating more complex DOM structures or edge cases to test the performance and accuracy of each method.
* Adding additional factors, such as network latency or concurrent execution, to simulate real-world scenarios.

Keep in mind that this benchmark is focused on comparing the performance and accuracy of `contains()` and `closest()`. Other alternatives might be useful for testing other JavaScript methods or libraries.

Related benchmarks:

contains vs closest1 (version: 0)

Comparing performance of: contains vs closest

Created: 4 years ago by: Guest

Jump to the latest result

contains

closest

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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