Benchmark: Save/Use element attribute

Script Preparation code:

var el = document.createElement('div');

Tests:

Set and Use Attribute
el.attribute = 123; console.dir(el.attribute)
Set Var/Attribute and Use Var
var variable = 123; el.attribute = variable; console.dir(variable)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Set and Use Attribute
Set Var/Attribute and Use Var

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark JSON to understand what is being tested.

**Benchmark Definition**

The website, MeasureThat.net, allows users to create microbenchmarks in JavaScript. The benchmark definition is represented by a JSON object that contains:

* `Name`: A unique name for the benchmark.
* `Description`: An optional description of the benchmark (in this case, null).
* `Script Preparation Code`: A code snippet that prepares the script environment before running the benchmark. In this case, it creates an HTML element (`var el = document.createElement('div');`).
* `Html Preparation Code`: An optional code snippet that prepares the HTML environment before running the benchmark (in this case, null).

**Individual Test Cases**

The test cases are represented by a JSON array of objects, each containing:

* `Benchmark Definition`: A string representing the JavaScript code to be executed during the benchmark.
* `Test Name`: An optional name for the test case.

In this example, there are two test cases:

1. "Set and Use Attribute": Executes the code `el.attribute = 123; console.dir(el.attribute)`.
2. "Set Var/Attribute and Use Var": Executes the code `var variable = 123; el.attribute = variable; console.dir(variable)`.

**Library Usage**

The `document.createElement('div')` function is used to create a new HTML element, which suggests that the benchmark is using the Document Object Model (DOM) API to interact with the DOM. The DOM API is a part of the HTML specification and allows JavaScript code to manipulate HTML documents and web pages.

**Special JS Feature or Syntax**

There is no indication in the provided benchmark definition or test cases that any special JavaScript features or syntax are being used.

**Options Compared**

The two test cases differ in how they use variables:

* In "Set and Use Attribute", a local variable `el.attribute` is assigned a value and then logged to the console.
* In "Set Var/Attribute and Use Var", a separate variable `variable` is declared, assigned a value, and then used to assign a new value to `el.attribute`, after which both variables are logged to the console.

**Pros and Cons**

The choice of approach depends on the specific use case:

* Using local variables (`el.attribute`) might be beneficial when:
	+ You need to minimize memory allocation and garbage collection.
	+ The variable's scope is limited to the current function or script block.
* Using separate variables (`variable`) might be beneficial when:
	+ You want to reuse the value in other parts of your code.
	+ You're working with complex data structures that require explicit variable assignment.

**Other Alternatives**

If you don't have access to MeasureThat.net, you can create similar benchmarks using a local JavaScript environment. Some alternatives include:

* Google Chrome DevTools' Timeline profiler
* Mozilla's SpiderMonkey Profiler (for Firefox/Gecko)
* Node.js' built-in profiler or a third-party library like `performance` or `Benchmark`
* A simple console.log() benchmarking framework, such as [Benchmark.js](https://github.com/dcodeio/benchmark)

Keep in mind that these alternatives might not provide the exact same features and flexibility as MeasureThat.net.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.90 Safari/537.36

Browser/OS: Chrome 75 on Windows

View result in a separate tab

Test name	Executions per second
Set and Use Attribute	154832.9 Ops/sec
Set Var/Attribute and Use Var	158676.5 Ops/sec

Related benchmarks:

Save/Use element attribute (version: 0)

Comparing performance of: Set and Use Attribute vs Set Var/Attribute and Use Var

Created: 5 years ago by: Registered User

Jump to the latest result

Set and Use Attribute

Set Var/Attribute and Use Var

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):