Benchmark: RegEx.test vs Array.find.includes

Script Preparation code:

var appState = "active";
var regex = /inactive|background/;
var arr = ['inactive', 'background'];

Tests:

RegEx.test
regex.test(appState);
Array.includes
arr.find(a => appState.includes(a));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
RegEx.test
Array.includes

Fastest: N/A

Slowest: N/A

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

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Let's break down the benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is comparing two approaches to find if an element exists in an array: using a regular expression (`regex.test`) or the `includes` method of the `Array.prototype`.

**Options Compared**

1. **Regular Expression (Regex) Approach**: The code uses the `test()` method on a regular expression object, which checks if any part of the string matches the regex pattern.
2. **Array.includes() Method**: This approach uses the `includes()` method on an array, which returns `true` if at least one element in the array is equal to the specified value.

**Pros and Cons**

* **Regex Approach**:
	+ Pros: Can be flexible for complex patterns and matching scenarios.
	+ Cons: May be slower due to the overhead of compiling a regex pattern, and can lead to unexpected behavior if not used carefully.
* **Array.includes() Method**:
	+ Pros: Faster and more straightforward than regex, with fewer potential pitfalls.
	+ Cons: Limited flexibility for complex patterns or matching scenarios.

In general, if you need to perform a simple search or check for existence in an array, `includes()` is likely a better choice. However, if you require more advanced pattern matching or have specific requirements that cannot be met by `includes()`, regex might be a better fit.

**Library and Purpose**

* **`regex.test`**: This method is part of the JavaScript standard library and is used to test whether a string matches a given regular expression pattern.
* **`Array.prototype.includes()`**: This method is also part of the JavaScript standard library and returns `true` if at least one element in the array is equal to the specified value.

**Special JS Feature or Syntax**

There are no special features or syntaxes being used in this benchmark that would require specific knowledge or expertise. The focus is on comparing two common approaches to array search, making it accessible to a wide range of software engineers.

**Other Alternatives**

If you're interested in exploring other alternatives for array search, some options include:

* Using `some()` method with an arrow function (e.g., `arr.some((a) => appState.includes(a))`)
* Implementing your own custom search function using a loop or recursion
* Utilizing libraries like Lodash's `includes()` function

Keep in mind that these alternatives might not be as efficient or straightforward as the built-in `includes()` method, but they can provide more control and flexibility for specific use cases.

I hope this explanation helps you understand the benchmark and its purpose!

Related benchmarks:

RegEx.test vs Array.find.includes (version: 0)

Comparing performance of: RegEx.test vs Array.includes

Created: 2 years ago by: Guest

Jump to the latest result

RegEx.test

Array.includes

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):