Benchmark: toggle vs add/remove odd

HTML Preparation code:

<div class="thediv test">Test</div>

Tests:

toggle
const el = document.querySelector('.thediv'); for (let i = 0; i < 1000; i++) { el.classList.toggle('test', i % 2); }
add and remove
const el = document.querySelector('.thediv'); for (let i = 0; i < 1000; i++) { if (i % 2) { el.classList.add('test'); } else { el.classList.remove('test'); } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
toggle
add and remove

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 dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition:**

The benchmark definition is a JSON object that describes the test case. It consists of:

* `Name` and `Description`: A brief name and description of the benchmark, which in this case are "toggle vs add/remove" and similar to the test case names.
* `Script Preparation Code` and `Html Preparation Code`: These fields specify any additional code required to prepare the test environment. In this case, both fields are null, indicating that no special setup is needed.

**Test Cases:**

The benchmark consists of two individual test cases:

1. **"toggle"`: This test case uses a simple loop to toggle the "test" class on an HTML element with the class "thediv". The loop runs 1000 times.
2. **"add and remove"`: This test case uses a similar loop, but instead of toggling the class, it adds the "test" class if the current iteration is odd and removes it otherwise.

**Comparison Options:**

The two test cases compare the performance of:

* **Toggling the class**: In the first test case, the `classList.toggle` method is used to add or remove the "test" class. This involves checking whether the element already has the class before adding or removing it.
* **Adding and removing the class**: In the second test case, the `classList.add` and `classList.remove` methods are used separately, which avoids the overhead of toggling.

**Pros and Cons:**

* **Toggling the class**:
	+ Pros:
		- More concise and readable code.
		- Less overhead since it only requires a single method call.
	+ Cons:
		- May incur additional overhead due to the check for existing classes.
* **Adding and removing the class**:
	+ Pros:
		- Avoids the potential overhead of toggling.
	+ Cons:
		- Requires two separate method calls, which may be less efficient.

**Library:**

There is no library explicitly mentioned in this benchmark. However, it's worth noting that the `classList` API is a part of the ECMAScript standard and has been supported by most modern browsers for several years.

**Special JS Features or Syntax:**

* None are explicitly used in these test cases. Both examples rely on standard JavaScript syntax and methods.

**Other Considerations:**

When running benchmarks like this, it's essential to consider factors such as:

* **Cache effects**: The `classList` API may have cache-like behavior, which can affect performance.
* **Browser optimizations**: Different browsers may optimize or implement the `classList` API differently, affecting performance.
* **Test environment**: The test environment and conditions can impact benchmark results.

**Alternatives:**

Other alternatives for testing class manipulation performance might include:

* Using a library like jQuery or Lodash to manipulate classes
* Using a different class naming convention (e.g., prefixing with "_") to avoid potential cache effects
* Testing other class-related operations, such as appending or removing elements with the same class.

Related benchmarks:

toggle vs add/remove odd (version: 0)

Toggle vs add/remove

Comparing performance of: toggle vs add and remove

Created: 4 years ago by: Guest

Jump to the latest result

toggle

add and remove

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):