Benchmark: ajquery - MeasureThat.net

Script Preparation code:

function $$(sel, el) {
  return (el || document).querySelectorAll(sel);
}

function $$2(sel, el) {
  return Array.from((el || document).querySelectorAll(sel));
}

Tests:

$$
$$('body')
$$2
$$2('body')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
$$
$$2

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 provided JSON and explain what is being tested.

**Benchmark Definition**

The benchmark definition is represented by a string that contains two functions, `$$` and `$$2`. These functions are used to query elements in an HTML document using JavaScript. The functions take two arguments: `sel` (selector) and `el` (element). If `el` is not provided, it defaults to the `document` object.

**Options Compared**

The benchmark compares two options:

1. **`$$`**: This function uses the `querySelectorAll` method to select all elements that match the given selector. It returns a NodeList of matching elements.
2. **`$$2`**: This function also uses the `querySelectorAll` method, but it returns an array-like object (Array.from) containing the selected elements.

**Pros and Cons**

Both options have their advantages and disadvantages:

* **`$$`**:
	+ Pros: More efficient, as NodeList is optimized for iteration.
	+ Cons: Can be slower when working with large datasets due to its limitations in some older browsers.
* **`$$2`**:
	+ Pros: Returns an array-like object, which can be more convenient for certain use cases.
	+ Cons: May incur additional overhead due to the conversion from a NodeList to an array-like object.

**Library and Purpose**

The `$$` and `$$2` functions seem to mimic the jQuery library's `.selectAll` method. However, there is no explicit mention of jQuery being used in the benchmark.

**Special JS Feature or Syntax**

There is no special JavaScript feature or syntax being tested in this benchmark. The focus is on comparing two different ways to query elements using the `querySelectorAll` method.

**Other Alternatives**

If you're looking for alternative ways to query elements, some popular options include:

* Vanilla `document.querySelectorAll`: Similar to the `$$` function but without the `$$2` variant.
* jQuery's `.selectAll` method: As mentioned earlier, this is being mimicked by the `$$` and `$$2` functions.
* CSS selectors with `querySelector` or `querySelectorAll`: These methods can be used to select elements using CSS selectors.

Keep in mind that the choice of query method depends on your specific use case, performance requirements, and personal preference.

Related benchmarks:

ajquery (version: 0)

Comparing performance of: $$ vs $$2

Created: 4 years ago by: Guest

Jump to the latest result

$$

$$2

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):