Benchmark: addClass vs cache

HTML Preparation code:

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

Script Preparation code:

var element = document.getElementById('div');
var a = 1;

Tests:

addClass
element.classList.add('test');
cache
a += 1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
addClass
cache

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 provided JSON benchmark definition and test cases.

**Benchmark Definition**

The website, MeasureThat.net, provides a way for users to create and run JavaScript microbenchmarks. The benchmark definition is represented by a JSON object that contains information about the script preparation code, HTML preparation code, and individual test cases.

In this specific case, the benchmark definition is:

```
{
    "Name": "addClass vs cache",
    "Description": "test",
    "Script Preparation Code": "var element = document.getElementById('div');\r\nvar a = 1;",
    "Html Preparation Code": "<div id=\"div\"></div>"
}
```

This benchmark definition specifies:

* A script preparation code that declares two variables: `element` and `a`, where `element` is retrieved using the `document.getElementById` method, and `a` is initialized to a value of 1.
* An HTML preparation code that creates a `<div>` element with an ID of "div".

**Individual Test Cases**

The benchmark definition includes two individual test cases:

```
[
    {
        "Benchmark Definition": "element.classList.add('test');",
        "Test Name": "addClass"
    },
    {
        "Benchmark Definition": "a += 1;",
        "Test Name": "cache"
    }
]
```

These test cases compare the performance of two approaches:

* `addClass`: This test case measures the performance of adding a class to an element using the `classList.add` method.
* `cache`: This test case measures the performance of incrementing a variable (`a`) without re-evaluating it, which is known as "caching".

**Library and Special Features**

The benchmark uses the `document.getElementById` method, which is a built-in JavaScript function that retrieves an element from the DOM by its ID. This function is part of the DOM (Document Object Model) API.

No special features or syntax are used in this benchmark.

**Pros and Cons of Different Approaches**

Here's a brief overview of the pros and cons of each approach:

* `addClass`:
	+ Pros: This method is widely supported by modern browsers and can be more efficient for adding classes to elements.
	+ Cons: It may introduce additional overhead due to the creation of an intermediate array and the use of the `classList` API.
* `cache`:
	+ Pros: Incrementing a variable without re-evaluating it can be faster in some cases, especially when the variable is not used extensively.
	+ Cons: This approach assumes that the variable will be incremented multiple times, which may not always be the case. Additionally, incrementing a variable without re-evaluating it can lead to unexpected behavior if not handled correctly.

**Other Alternatives**

If you're interested in exploring alternative approaches or optimizing the performance of your JavaScript code, here are some alternatives to consider:

* Use `const` and `let` instead of `var` for declaring variables.
* Use template literals or string concatenation instead of using the `+` operator for string interpolation.
* Consider using a Just-In-Time (JIT) compiler like V8 or SpiderMonkey to optimize your JavaScript code for specific use cases.

Keep in mind that the best approach depends on the specific requirements and constraints of your project.

Related benchmarks:

addClass vs cache (version: 0)

test

Comparing performance of: addClass vs cache

Created: 5 years ago by: Guest

Jump to the latest result

addClass

cache

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):