Benchmark: Show hide - MeasureThat.net

HTML Preparation code:

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>
<table id="table">
</table>
<script>
var n_rows = 10000
var rows = []
var table = document.createElement("table")
for (var i=0; i<n_rows; i++) {
    var content = document.createTextNode("Content");
    var td = document.createElement("td");
    var tr = document.createElement("tr");
    td.appendChild(content);
    tr.appendChild(td);
    table.appendChild(tr)
}
</script>

Script Preparation code:

var table = $("#table")
var hide = ["table "]
var show = ["table "]
var update = function() {
  var s = show.join(", ");
  var h = hide.join(", ");
  $(s).show()
  $(h).hide()
}

Tests:

For each
table.children().each(function (i, element) { if (i % 2 === 0) element.show() else element.hide() });
Selector
table.children().each(function (i, element) { if (i % 2 === 0) show.push("tr:nth-child("+i+")") else hide.push("tr:nth-child("+i+")") if(i === n_rows-1) update(); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
For each
Selector

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.

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark measures the performance of two approaches for hiding and showing rows in a table.

**Script Preparation Code Analysis**

The script preparation code sets up a basic HTML structure with a table, initializes an array `show` and `hide` containing CSS selectors for showing and hiding rows, respectively. It also defines an `update` function that applies the selected CSS rules to the table using jQuery. The `table.children()` method is used to iterate over the table's child elements.

**Html Preparation Code Analysis**

The HTML preparation code includes a script tag that loads the jQuery library from Google's CDN. It then creates a basic table structure with 10,000 rows and initializes a variable `n_rows` to store the number of rows.

**Test Cases**

There are two test cases:

1. **For each**
This test case uses the `table.children().each()` method to iterate over the table's child elements. Inside the loop, it checks if the index `i` is even and shows the corresponding row using `element.show()`. If the index is odd, it hides the row using `element.hide()`.
2. **Selector**
This test case uses a similar approach as the previous one but stores the CSS selectors for showing and hiding rows in the `show` and `hide` arrays, respectively. After each iteration, it calls the `update()` function to apply the selected CSS rules.

**Options Comparison**

The two test cases differ in their approach:

* **For each**: Iterates over the table's child elements using `table.children().each()`, which may not be optimized for performance.
* **Selector**: Stores CSS selectors for showing and hiding rows, which can be more efficient if the browser supports these selectors.

**Pros and Cons**

Pros of **For each**:

* Simple and easy to understand
* Works with older browsers that don't support CSS selectors

Cons:

* May not be optimized for performance
* Can be slower due to the iteration overhead

Pros of **Selector**:

* More efficient if the browser supports CSS selectors
* Can be faster due to the use of cached selectors

Cons:

* Requires a good understanding of CSS selectors and their performance implications
* May not work in older browsers that don't support these selectors

**Library: jQuery**

The `update()` function uses jQuery's `show()` and `hide()` methods, which rely on CSS transitions or animations to update the element's visibility. This library is used to simplify the benchmarking process by abstracting away low-level DOM manipulation.

**Special JS Feature/Syntax**

This benchmark does not use any special JavaScript features or syntax that would affect its performance. However, it relies on modern browser support for CSS selectors and jQuery's `show()` and `hide()` methods.

**Alternatives**

Other alternatives to measure the performance of hiding and showing rows in a table might include:

* Using a pure DOM manipulation approach without relying on libraries like jQuery
* Utilizing Web Workers or parallel processing to execute multiple iterations concurrently
* Implementing a custom, optimized algorithm for iterating over the table's child elements

Related benchmarks:

Show hide (version: 0)

Comparing performance of: For each vs Selector

Created: 8 years ago by: Guest

Jump to the latest result

For each

Selector

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):