Benchmark: querySelector shorthand

HTML Preparation code:

<script>
  const DOC = (s,c) => (c ?? document).querySelector(s);
</script>

<div id="foo">Hello World</div>

Tests:

Vanilla get text
let text = document.querySelector("#foo").innerText;
Shorthand get text
let text = DOC("#foo").innerText;
Vanilla set text
document.querySelector("#foo").innerText = "Hello There";
Shorthand set text
DOC("#foo").innerText = "Hello There";

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Vanilla get text
Shorthand get text
Vanilla set text
Shorthand set text

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):

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Let's break down the benchmark and explain what's being tested, compared options, pros and cons, and other considerations.

**Benchmark Definition JSON**

The benchmark defines two variables: `DOC` and an HTML document with a single element `<div id="foo">Hello World</div>`.

* `DOC` is a function that takes two arguments: `s` (selector) and `c` (document context). If `c` is not provided, it defaults to the current document object. The purpose of `DOC` is to provide a convenient way to query elements using the shorthand syntax.
* The HTML document contains a `<div>` element with an ID of "foo" and the text content "Hello World".

**Individual Test Cases**

There are four test cases:

1. **Vanilla get text**: This test case measures the execution time of retrieving the inner text of the `#foo` element using vanilla JavaScript's `document.querySelector()` method.
2. **Shorthand get text**: This test case measures the execution time of retrieving the inner text of the `#foo` element using the shorthand syntax defined by `DOC`.
3. **Vanilla set text**: This test case measures the execution time of setting the inner text of the `#foo` element using vanilla JavaScript's `document.querySelector()` method.
4. **Shorthand set text**: This test case measures the execution time of setting the inner text of the `#foo` element using the shorthand syntax defined by `DOC`.

**Comparison Options**

The benchmark compares two approaches:

* **Vanilla JS**: Using vanilla JavaScript methods, such as `document.querySelector()` and `innerText`.
* **Shorthand (via DOC)**: Using the shorthand syntax defined by `DOC`, which is a convenience wrapper around vanilla JavaScript's querySelector() method.

**Pros and Cons of Each Approach**

**Vanilla JS**

Pros:

* Well-established and widely supported
* Can be used in any context, without relying on a specific library or implementation

Cons:

* May be slower than the shorthand syntax, due to the overhead of calling `querySelector()` and accessing `innerText`
* Requires more boilerplate code to achieve similar results

**Shorthand (via DOC)**

Pros:

* Provides a convenient and expressive way to query elements
* Can be faster than vanilla JS, since it avoids the overhead of calling `querySelector()`

Cons:

* Relies on a specific implementation (`DOC`) that may not be compatible with all browsers or environments
* May require more code changes if the implementation is modified or updated

**Other Considerations**

* The benchmark uses Chrome 98 and Windows as the test platform, which may not be representative of other platforms or browsers.
* The test cases focus on retrieving and setting inner text content, but do not account for other use cases, such as querying child elements or manipulating attribute values.

**Alternatives**

If you're interested in exploring alternative benchmarks or test cases, here are some suggestions:

* Measure the performance of different DOM traversal strategies, such as `querySelector()` vs. `getElementsByTagName()`
* Compare the execution times of different caching mechanisms, such as memoization vs. lazy loading
* Investigate the impact of various CSS styles and layouts on JavaScript performance

Related benchmarks:

querySelector shorthand (version: 0)

querySelector shorthand vs vanilla JS

Comparing performance of: Vanilla get text vs Shorthand get text vs Vanilla set text vs Shorthand set text

Created: 4 years ago by: Guest

Jump to the latest result

Vanilla get text

Shorthand get text

Vanilla set text

Shorthand set text

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):