Benchmark: style.display = none vs. style.display = none on a function

HTML Preparation code:

<div id="foo"></div>

Tests:

style.display = none
var i = 3000; while (i--) { document.getElementById("foo").style.display = 'none'; document.getElementById("foo").style.display = 'block'; }
classList add hide
var i = 3000; while (i--) { HideElement("foo"); ShowElement("foo"); } function HideElement(element) { document.getElementById(element).style.display = 'none'; } function ShowElement(element) { document.getElementById(element).style.display = 'block'; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
style.display = none
classList add hide

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 benchmark and explain what is tested, compared, and the pros/cons of different approaches.

**Benchmark Definition**

The benchmark is defined by two test cases:

1. `style.display = none`
2. `classList add hide`

Both test cases aim to measure the performance difference between setting `display` property to `none` (or using a CSS class with `hide`) and using a separate function (`HideElement`) to toggle the element's visibility.

**Script Preparation Code**

The script preparation code is empty, which means that no additional setup or initialization is required for the benchmark.

**Html Preparation Code**

The HTML preparation code only includes a `<div>` element with an ID of "foo", which will be used as the test subject.

**Test Cases**

Let's examine each test case in more detail:

### Test Case 1: `style.display = none`

This test case uses a simple loop that sets the `display` property to `none` and then immediately back to `'block'`. The intention is to measure the performance of setting the `display` property directly.

**Library/Function:** None

There are no external libraries or functions used in this test case.

**Special JS Feature/Syntax:** No special features or syntax are used.

### Test Case 2: `classList add hide`

This test case uses a separate function (`HideElement`) to toggle the element's visibility. The intention is to measure the performance of using a class-based approach with CSS.

**Library/Function:** `HideElement` and `ShowElement` functions

The `HideElement` function sets the `display` property to `'none'`, while the `ShowElement` function sets it back to `'block'`. These functions are likely implemented in a way that takes into account various optimizations, such as caching or using optimized DOM methods.

**Special JS Feature/Syntax:** The use of CSS classes and JavaScript functions is a common approach in modern web development. This syntax is widely supported by most browsers.

**Pros/Cons:**

* **Pro:** Class-based approaches are often more efficient and flexible than direct property manipulation.
* **Con:** The use of separate functions may add overhead due to function calls, which can impact performance.

**Other Alternatives:**

1. Using `style.display` with a boolean value (`style.display = true` or `style.display = false`)
2. Using CSS transitions or animations to achieve the same effect
3. Using other libraries or frameworks that provide optimized DOM manipulation methods

In terms of alternatives, MeasureThat.net may also consider testing other approaches, such as:

1. Using ` document.querySelector` with a predicate function to select the element and toggle its visibility.
2. Using Web Workers or other parallel execution techniques to compare performance between different approaches.

However, these alternatives would likely require more complex benchmarking setups and might not be immediately relevant to the specific use case of measuring the performance difference between setting `display` property directly versus using a class-based approach.

Related benchmarks:

style.display = none vs. style.display = none on a function (version: 0)

Comparing performance of: style.display = none vs classList add hide

Created: 8 years ago by: Guest

Jump to the latest result

style.display = none

classList add hide

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):