Benchmark: React Const vs Function (3)

HTML Preparation code:

<script crossorigin src="https://unpkg.com/react@16/umd/react.production.min.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.production.min.js"></script>
<div id="dest"></div>

Tests:

function
function Hello({toWhat}) { return React.createElement('div', null, `Hello ${toWhat}`); } ReactDOM.render( React.createElement(Hello, {toWhat: 'Worldd'}, null), document.getElementById('dest') );
const
const Hello = ({toWhat}) => React.createElement('div', null, `Hello ${toWhat}`); ReactDOM.render( React.createElement(Hello, {toWhat: 'World'}, null), document.getElementById('dest') );

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
function
const

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.

Measuring JavaScript performance is an essential task in web development, and tools like MeasureThat.net help users compare different approaches.

**Benchmark Overview**

The benchmark compares the execution speed of two types of JavaScript function declarations: `const` and `function`. Specifically, it measures how fast React components can be rendered using these two approaches.

**Options Compared**

The benchmark tests two options:

1. **`const` function declaration**: This approach uses a constant variable declaration to define the function.
2. **`function` function declaration**: This approach uses a traditional variable declaration with `var`, `let`, or `const`.

**Pros and Cons of Each Approach**

* **`const` function declaration:**
	+ Pros:
		- Faster execution speed due to better optimization by the JavaScript engine (V8 in Chrome, SpiderMonkey in Firefox).
		- Easier to read and write code.
	+ Cons:
		- Limited use cases, as it can only be used with functions that never change value.
* **`function` function declaration:**
	+ Pros:
		- More versatile, as it can be used for any type of variable declaration (e.g., `var`, `let`, `const`).
	+ Cons:
		- Slower execution speed due to slower optimization by the JavaScript engine.

**Library and Its Purpose**

The benchmark uses React, a popular JavaScript library for building user interfaces. Specifically:

* The `React.createElement` function is used to create virtual DOM elements.
* The `ReactDOM.render` function is used to render the components to the DOM.

In this benchmark, the `const` approach creates a new constant variable `Hello`, which is then used to define the component function. The `function` approach defines the function directly without using a constant variable.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes used in this benchmark.

**Other Alternatives**

Other alternatives for measuring JavaScript performance include:

* Google Closure Compiler: A popular tool for optimizing and minifying JavaScript code.
* Webpack: A modern web development build tool that can also measure performance.
* Node.js Performance Benchmarks: A set of benchmarks specifically designed for measuring the performance of Node.js applications.

Keep in mind that these alternatives may not be as straightforward to use as MeasureThat.net, which provides a simple and intuitive way to compare different JavaScript approaches.

Related benchmarks:

React Const vs Function (3) (version: 0)

Comparing performance of: function vs const

Created: 3 years ago by: Guest

Jump to the latest result

function

const

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):