Benchmark: Empty an element

HTML Preparation code:

<div id="parent">
  <div></div>

</div>

Script Preparation code:

var parent = document.getElementById('parent');

Tests:

textContent
parent.textContent = '';
innerHTML
parent.innerHTML = '';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
textContent
innerHTML

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net and understand what's being tested in this benchmark.

**What is tested:**

The provided JSON represents a JavaScript microbenchmark that tests two approaches for emptying an HTML element:

1. `textContent = '';`
2. `innerHTML = '';`

These two approaches are compared to determine which one is faster and more efficient on the target machine (in this case, a Windows 7 desktop with Chrome 69 browser).

**Options compared:**

The benchmark compares two options for emptying an HTML element:

1. **`textContent = '';`**: This approach uses the `textContent` property of the parent element to set its text content to an empty string.
2. **`innerHTML = '';`**: This approach uses the `innerHTML` property of the parent element to set its innerHTML to an empty string.

**Pros and cons:**

*   `textContent = '';`:
    *   Pros:
        *   More efficient, as it only updates the text content without affecting the element's structure.
        *   Less likely to trigger JavaScript optimizations or reflows.
    *   Cons:
        *   May not work in all cases (e.g., if the parent element has a `style` attribute).
*   `innerHTML = '';`:
    *   Pros:
        *   Works in most cases, as it updates both the text content and the element's structure.
    *   Cons:
        *   Less efficient, as it triggers more JavaScript optimizations and reflows.

**Library and its purpose:**

The benchmark uses the `document.getElementById()` method to retrieve a reference to an HTML element with the id "parent". The `document.getElementById()` function is a built-in JavaScript method that returns a single element object based on the provided id string. In this case, it's used to set up the parent element for the test.

**Special JS feature or syntax:**

There are no special JavaScript features or syntax mentioned in the benchmark setup code. The code uses standard JavaScript syntax and features.

**Other alternatives:**

If you wanted to write a similar benchmark using MeasureThat.net, you would:

1.  Create a new benchmark definition with the same name, description, script preparation code, and HTML preparation code.
2.  Define two test cases with different `Benchmark Definition` strings (e.g., one for `textContent = '';` and one for `innerHTML = '';`).
3.  Set up the necessary variables, libraries, and configurations to compare the performance of these two approaches.

Here's an example benchmark definition JSON:

```json
{
    "Name": "Empty an element",
    "Description": null,
    "Script Preparation Code": "var parent = document.getElementById('parent');",
    "Html Preparation Code": "<div id=\"parent\">\r\n  <div></div>\r\n\r\n</div>"
}
```

```json
[
    {
        "Benchmark Definition": "parent.textContent = '';",
        "Test Name": "textContent"
    },
    {
        "Benchmark Definition": "parent.innerHTML = '';",
        "Test Name": "innerHTML"
    }
]
```

This is just a starting point, and you would need to modify the benchmark definition according to your specific use case.

Related benchmarks:

Empty an element (version: 0)

Comparing performance of: textContent vs innerHTML

Created: 8 years ago by: Registered User

Jump to the latest result

textContent

innerHTML

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):