Benchmark: string.split vs useMemo string.split

HTML Preparation code:


<script src="https://cdnjs.cloudflare.com/ajax/libs/react/18.2.0/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/18.2.0/umd/react-dom.production.min.js"></script>
<div id="root"></div>

Script Preparation code:

var root = ReactDOM.createRoot(document.getElementById('root'));

const myString = 'someValueOrSomething:someOtherThing:EvenMoreStuff'

function ComponentBaseline() {
    return React.createElement('div', {}, 'someOtherThing');
}

function ComponentWithSplitUseMemo() {
    const [first, middle, last] = React.useMemo(() => myString.split(':'), [myString]);
    return React.createElement('div', {}, middle);
}

function ComponentWithSplit() {
    const [first, middle, last] = myString.split(':')
    return React.createElement('div', {}, middle);
}

Tests:

Split useMemo
root.render(React.createElement(ComponentWithSplitUseMemo));
Split every render
root.render(React.createElement(ComponentWithSplit));
Baseline
root.render(React.createElement(ComponentBaseline));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Split useMemo
Split every render
Baseline

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/115.0.0.0 Safari/537.36

Browser/OS: Chrome 115 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Split useMemo	1757893.1 Ops/sec
Split every render	1859741.2 Ops/sec
Baseline	1943355.8 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark defines three test cases:

1. **ComponentWithSplitUseMemo**: This test case uses `React.useMemo` to split the string into parts when the component mounts. The `useMemo` hook ensures that the string is only split once, even if the component is re-rendered.
2. **ComponentWithSplit**: This test case splits the string into parts every time the component is rendered. It does not use any memoization or optimization techniques to reduce unnecessary computations.
3. **ComponentBaseline**: This test case uses a simple baseline that returns a fixed value without any computation.

**Comparison**

The three test cases are compared in terms of their execution performance:

* **ComponentWithSplitUseMemo** vs **ComponentWithSplit**: This comparison tests the trade-off between memoization (using `React.useMemo`) and unnecessary computations when splitting the string every render.
* **ComponentBaseline** vs **ComponentWithSplit** vs **ComponentWithSplitUseMemo**: This comparison tests the baseline performance of the component without any computation, versus the two other test cases with varying levels of optimization.

**Pros and Cons**

1. **ComponentWithSplitUseMemo**:
	* Pros: Reduced unnecessary computations when splitting the string.
	* Cons: Additional overhead due to `React.useMemo` hook.
2. **ComponentWithSplit**:
	* Pros: No additional overhead for memoization.
	* Cons: Unnecessary computations and potential performance issues.
3. **ComponentBaseline**:
	* Pros: Fast execution with no computation.
	* Cons: Limited usefulness as a benchmark.

**Library Usage**

The benchmark uses the following libraries:

1. **React**: A JavaScript library for building user interfaces.
2. **ReactDOM**: A companion library to React that provides DOM-related functionality.
3. **React DOM**: A set of DOM-related components provided by React.

**Special JS Feature/Syntax**

This benchmark does not explicitly mention any special JavaScript features or syntax, such as async/await, Promises, or modern JavaScript syntax (e.g., arrow functions, template literals).

**Other Alternatives**

If you want to compare these test cases with alternative approaches, consider the following:

1. **Use a different memoization library**: Compare `React.useMemo` with other memoization libraries, such as Lodash's `memoize`.
2. **Use a different rendering strategy**: Compare `React.render()` with other rendering strategies, such as React Fiber or Virtual DOM.
3. **Compare with native JavaScript**: Compare the performance of these test cases with native JavaScript implementations, such as string splitting using `String.prototype.split()`.

Related benchmarks:

string.split vs useMemo string.split (version: 0)

Comparing performance of: Split useMemo vs Split every render vs Baseline

Created: one year ago by: Registered User

Jump to the latest result

Split useMemo

Split every render

Baseline

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):