Benchmark: querySelectorAll vs closest

HTML Preparation code:

<div class="mz-collapse--one-active demo--card mz-border--outline">
                    <div class="demo--card-header mz-border--bottom mz-typography--font-bold mz-clickable" data-trigger="collapse" data-target="#demoAccordion1b" aria-expanded="true"><div id="test">Test</div></div>
                    <div class="mz-collapse is-visible" id="demoAccordion1b">
                        <div class="demo--card-content mz-border--bottom">
                            Some quick example text to build on the collapsible title and make up the bulk of the collapsible's content.
                        </div>
                    </div>
                    <div class="demo--card-header mz-border--bottom mz-typography--font-bold mz-clickable" data-trigger="collapse" data-target="#demoAccordion2b" aria-expanded="false">Collapsible group item #2</div>
                    <div class="mz-collapse" id="demoAccordion2b">
                        <div class="demo--card-content mz-border--bottom">
                            Some quick example text to build on the collapsible title and make up the bulk of the collapsible's content.
                        </div>
                    </div>
                    <div class="demo--card-header mz-typography--font-bold mz-clickable" data-trigger="collapse" data-target="#demoAccordion3b" aria-expanded="false">Collapsible group item #3</div>
                    <div class="mz-collapse" id="demoAccordion3b">
                        <div class="demo--card-content mz-border--top">
                            Some quick example text to build on the collapsible title and make up the bulk of the collapsible's content.
                        </div>
                    </div>
                </div>

Tests:

querySelectorAll
let test = document.getElementById("test"); let vtrigger; let triggers = test.querySelectorAll('[data-trigger="collapse"]'); for (let i = 0; i < triggers.length; i++) { let trigger = triggers[i]; if (trigger === evt.target || trigger.contains(evt.target)) { vtrigger = trigger; } }
closest
let test = document.getElementById("test"); let vtrigger = test.closest('[data-trigger="collapse"]');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
querySelectorAll
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):

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Let's break down the provided JSON and explain what's being tested.

**Benchmark Definition:**
The benchmark is comparing two DOM selection methods in JavaScript: `querySelectorAll` and `closest`. The goal is to determine which method is faster for selecting elements with a specific attribute (`data-trigger="collapse"`).

**Options Compared:**

1. **`querySelectorAll`**: This method returns all elements that match the specified selector (in this case, `[data-trigger="collapse"]`). It's a more generic method that can return multiple elements, which might be slower than `closest` because it needs to filter the results.
2. **`closest`**: This method returns the closest ancestor element that matches the specified selector (in this case, `[data-trigger="collapse"]`). It's generally faster than `querySelectorAll` because it only needs to traverse a single element hierarchy.

**Pros and Cons:**

* **`querySelectorAll`**:
	+ Pros: Can return multiple elements, more flexible.
	+ Cons: Might be slower due to the need to filter results.
* **`closest`**:
	+ Pros: Faster, as it only needs to traverse a single element hierarchy.
	+ Cons: Only returns the closest ancestor element, not all matching elements.

**Library and Purpose:**
The `closest` method is implemented in the Chromium browser engine (specifically, in the `WebCore` library). It's used by browsers like Chrome, Safari, and Edge to provide a faster way to select elements with a specific attribute.

**Special JS Feature or Syntax:**
There is no special JavaScript feature or syntax being tested here. The benchmark only focuses on comparing the performance of two existing DOM selection methods (`querySelectorAll` and `closest`).

**Other Alternatives:**
If you need to select elements with a specific attribute, other alternatives might include:

* **`querySelector`**: Similar to `querySelectorAll`, but returns only one element that matches the specified selector.
* **`getElementsByAttribute`**: An older method for selecting elements based on an attribute value. It's generally slower than `querySelectorAll` and `closest`.
* **`document.querySelector`** (with a CSS selector): Can be used to select elements with a specific attribute, but might not be as fast as `closest`.

Keep in mind that the choice of DOM selection method depends on the specific use case and performance requirements.

Related benchmarks:

querySelectorAll vs closest (version: 0)

Comparing performance of: querySelectorAll vs closest

Created: 6 years ago by: Guest

Jump to the latest result

querySelectorAll

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):