Benchmark: string match in list: switch case vs array.includes

Tests:

switch case
((v) => { switch (v) { case 'asdpopqnf': case 'zbvxcvuud': case 'qwtewoiru': case 'pojfopdgd': case 'tuunreiro': return true; } return false; })('tuunreiro')
array.includes
((v) => { return [ 'asdpopqnf', 'zbvxcvuud', 'qwtewoiru', 'pojfopdgd', 'tuunreiro' ].includes(v); })('tuunreiro')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
switch case
array.includes

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
switch case	225162544.0 Ops/sec
array.includes	108454352.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark and its test cases to explain what's being tested, compared, and their pros and cons.

**Benchmark Overview**

The MeasureThat.net website provides a platform for users to create and run JavaScript microbenchmarks. The provided benchmark is designed to compare two approaches: `switch case` and `array.includes` for checking if a string exists in an array.

**Test Cases**

There are two test cases:

1. **`switch case`**:
```javascript
((v) => {
  switch (v) {
    case 'asdpopqnf':
    case 'zbvxcvuud':
    case 'qwtewoiru':
    case 'pojfopdgd':
    case 'tuunreiro':
      return true;
  }
  return false;
})('tuunreiro')
```
This test case uses a `switch` statement to check if the input string `'tuunreiro'` matches any of the specified cases. The `switch` statement is a traditional approach for pattern matching.

2. **`array.includes`**:
```javascript
((v) => {
  return [
    'asdpopqnf',
    'zbvxcvuud',
    'qwtewoiru',
    'pojfopdgd',
    'tuunreiro'
  ].includes(v);
})('tuunreiro')
```
This test case uses the `array.includes` method to check if the input string `'tuunreiro'` exists in the provided array.

**Comparison**

The benchmark compares the execution times of these two approaches for a specific test case. The goal is to determine which approach is faster and more efficient.

**Pros and Cons**

1. **`switch case`**:
	* Pros:
		+ Can be optimized by the browser's JavaScript engine, reducing overhead.
		+ Can provide better performance for certain types of patterns (e.g., integer comparisons).
	* Cons:
		+ More verbose and less readable than other approaches.
		+ May not work as expected with large or complex arrays.
2. **`array.includes`**:
	* Pros:
		+ Shorter and more readable code.
		+ Works well for small to medium-sized arrays.
	* Cons:
		+ Can be slower due to the overhead of searching through the array.
		+ May not be optimized by the browser's JavaScript engine.

**Library and Special JS Features**

In this benchmark, there are no external libraries being used. However, it does utilize the `includes` method on an array, which is a built-in JavaScript feature introduced in ECMAScript 2015 (ES6).

**Other Alternatives**

If you're looking for alternative approaches to string matching or array searching, consider:

1. **Regular expressions**: A powerful but complex way to match patterns in strings.
2. **Arrays.prototype.some()**: An alternative to `array.includes` that stops iterating as soon as a match is found.
3. **NativeArray.prototype.indexOf()**: A method that searches for the first occurrence of a value in an array.

These alternatives may offer better performance or more flexibility, but they also come with additional complexity and potential overhead.

Keep in mind that the best approach depends on your specific use case, performance requirements, and code readability considerations.

Related benchmarks:

string match in list: switch case vs array.includes (version: 0)

Comparing performance of: switch case vs array.includes

Created: one year ago by: Guest

Jump to the latest result

switch case

array.includes

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):