Benchmark: variable vs object vs dataset

HTML Preparation code:

<div id="foo" data-bar="bar"></div>

Tests:

object entry
const element = document.getElementById("foo"); const ob = {}; ob.data = element.dataset.bar; var i = 2000; while (i--) { console.log(ob.data); }
dataset
const element = document.getElementById("foo"); var i = 2000; while (i--) { console.log(element.dataset.bar); }
variable
const element = document.getElementById("foo"); const bar = element.dataset.bar; var i = 2000; while (i--) { console.log(bar); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
object entry
dataset
variable

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36

Browser/OS: Chrome 85 on Linux

View result in a separate tab

Test name	Executions per second
object entry	44.6 Ops/sec
dataset	41.0 Ops/sec
variable	44.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

Let's dive into explaining the provided benchmark.

**What is being tested?**

The test measures how fast JavaScript code runs in three different scenarios:

1. **Storing data in an object (`object`)**: The code creates an empty object `ob`, assigns the value of `element.dataset.bar` to its `data` property, and then logs the `data` property repeatedly using a while loop.
2. **Accessing data from a variable (`variable`)**: The code directly accesses the value of `element.dataset.bar` through the `bar` variable, and then logs it repeatedly using a while loop.
3. **Retrieving data from a dataset (`dataset`)**: This is similar to the "variable" scenario, but the data is retrieved directly from `element.dataset.bar`.

**Options compared**

The three options being compared are:

1. Storing data in an object
2. Accessing data through a variable
3. Retrieving data directly from a dataset

These options represent different ways of accessing and manipulating data in JavaScript.

**Pros and cons of each approach**

* **Storing data in an object (`object`)**:
	+ Pros: Can lead to more robust and maintainable code, as the data is encapsulated within the object.
	+ Cons: May incur additional overhead due to object creation and manipulation.
* **Accessing data through a variable (`variable`)**
	+ Pros: Simple and straightforward access to data, with minimal overhead.
	+ Cons: Can lead to tight coupling between variables and make code harder to understand and maintain.
* **Retrieving data directly from a dataset (`dataset`)**:
	+ Pros: Similar to accessing data through a variable, but might be more efficient due to the direct access.
	+ Cons: Limited control over data manipulation and modification.

**Library used**

In this benchmark, no specific library is explicitly mentioned. However, it's likely that the `element` object is an HTML element created using the DOM (Document Object Model) API.

**Special JavaScript features or syntax**

This benchmark does not explicitly use any special JavaScript features or syntax beyond standard ES5 syntax. However, it does rely on modern web technologies like HTML5 and CSS3 for creating the test environment.

**Other alternatives**

If you were to implement this benchmark yourself, you might consider adding more scenarios, such as:

* Storing data in an array
* Using a library like Lodash or Ramda to manipulate data
* Implementing caching mechanisms to reduce repeated lookups

Keep in mind that the specific alternatives will depend on your goals and requirements.

I hope this explanation helps!

Related benchmarks:

variable vs object vs dataset (version: 0)

storing in variable vs to an object vs getting from dataset

Comparing performance of: object entry vs dataset vs variable

Created: 4 years ago by: Guest

Jump to the latest result

object entry

dataset

variable

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):