Benchmark: Children vs QuerySelectorALL

HTML Preparation code:

<div id="address-full-form">
				<div class="form-group">
					<label for="shipp_address">Вулиця</label>
					<input type="text" class="form-control" id="shipp_address" name="shipp_address" value="Rua Portelas, 1">
				</div>
				<div class="form-group">
					<label for="shipp_city">Місто / Село</label>
					<input type="text" class="form-control" id="shipp_city" name="shipp_city" value="Porto Salvo">
				</div>
				<div class="form-group">
					<label for="shipp_postcode">Поштовий індекс</label>
					<input type="text" class="form-control" id="shipp_postcode" name="shipp_postcode" value="2740">
				</div>
				<div class="form-group">
					<label for="shipp_latitude">Latitude</label>
					<input type="text" class="form-control" id="shipp_latitude" name="shipp_latitude" value="38.7221347">
				</div>
				<div class="form-group">
					<label for="shipp_longitude">Longitude</label>
					<input type="text" class="form-control" id="shipp_longitude" name="shipp_longitude" value="-9.3084501">
				</div>
			</div>

Tests:

getElementById
function getFieldsById() { const ShAdrsField = document.getElementById('shipp_address'); const ShCityField = document.getElementById('shipp_city'); const ShPstCdField = document.getElementById('shipp_postcode'); const ShMapLtdField = document.getElementById('shipp_latitude'); const ShMapLngField = document.getElementById('shipp_longitude'); }
children
function getFieldsByChildren() { const addressForm = document.getElementById('address-full-form'); const ShAdrsField = addressForm.children[0].children[1]; const ShCityField = addressForm.children[1].children[1]; const ShPstCdField = addressForm.children[2].children[1]; const ShMapLtdField = addressForm.children[3].children[1]; const ShMapLngField = addressForm.children[4].children[1]; }
getFieldsByQuerySelectorAll
function getFieldsByQuerySelectorAll() { const addressForm = document.getElementById('address-full-form'); const [ShAdrsField, ShCityField, ShPstCdField, ShMapLtdField, ShMapLngField] = Array.from(addressForm.querySelectorAll('input')); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
getElementById
children
getFieldsByQuerySelectorAll

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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I'll dive into explaining the benchmark and its various aspects.

**Benchmark Overview**

The benchmark compares three ways to retrieve specific fields from an HTML form: `getElementById`, `children`, and `getFieldsByQuerySelectorAll`.

**Options Compared**

1. **`getElementById`**: This method uses the `document.getElementById()` function to directly access an element by its ID.
2. **`children`**: This method uses the `children` property of the parent element to traverse the DOM tree and find the desired child elements.
3. **`getFieldsByQuerySelectorAll`**: This method uses the `querySelectorAll()` function with a CSS selector to retrieve all matching elements.

**Pros and Cons**

* **`getElementById`**:
	+ Pros: Fast, straightforward, and widely supported.
	+ Cons: Only works if the element has an ID attribute, which might not be the case in complex forms.
* **`children`**:
	+ Pros: Works with any type of child element, but requires traversing the DOM tree, which can be slower.
	+ Cons: Less flexible than `getElementById`, as it relies on the parent element's structure.
* **`getFieldsByQuerySelectorAll`**:
	+ Pros: Highly flexible and efficient for complex forms, as it uses a CSS selector to match elements.
	+ Cons: Requires modern browsers that support the `querySelectorAll()` function with CSS selectors.

**Library/JS Feature**

The benchmark uses vanilla JavaScript, without any external libraries. However, it does utilize modern browser features like `querySelectorAll()` and CSS selectors.

**Special JS Features/Syntax**

None mentioned in this specific benchmark.

**Other Considerations**

* **Browser Support**: The benchmark results show that Chrome 117 is the most consistent performer across all three methods.
* **DOM Traversal**: The `children` method may cause performance issues if the form has a large number of child elements or if the parent element has many nested structures.
* **CSS Selectors**: The `getFieldsByQuerySelectorAll` method relies on efficient CSS selectors. Poorly written selectors can lead to slow performance or even crashes.

**Alternatives**

Other methods for retrieving fields from an HTML form include:

1. **Using a library like jQuery**: Provides a more intuitive and flexible way to traverse the DOM, but may introduce additional overhead.
2. **Using `getElementsByClassName()`**: A simpler alternative to `querySelectorAll()`, but still requires modern browser support.
3. **Using a more complex CSS selector**: Can provide better performance for specific use cases, but may become overly complicated if not used carefully.

Keep in mind that the choice of method depends on the specific requirements and constraints of your project.

Related benchmarks:

Children vs QuerySelectorALL (version: 3)

Children vs QuerySelectorALL

Comparing performance of: getElementById vs children vs getFieldsByQuerySelectorAll

Created: 2 years ago by: Registered User

Jump to the latest result

getElementById

children

getFieldsByQuerySelectorAll

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):