Benchmark: regexp vs string.includes

Script Preparation code:

var text = ["fasfgagasgagagsagasga", "afasfa<afas>fafasfga</aafas>"];
var isPontiallyHTML1 = (text) => text.includes('<') && text.includes('>');
var isPontiallyHTML2 = (text) => /<[^>]+>/.test(text);

Tests:

String.includes
text.map(isPontiallyHTML1)
RegExp
text.map(isPontiallyHTML2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String.includes
RegExp

Fastest: N/A

Slowest: N/A

Latest run results:

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

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

**Benchmark Definition**

The benchmark is comparing two approaches to check if a string contains HTML tags: `String.includes` (using JavaScript's built-in string method) versus `RegExp` (using regular expressions).

**Options Compared**

1. **String.includes**: This method uses the `includes()` function to search for a substring within a string. It returns `true` if the substring is found, and `false` otherwise.
2. **RegExp**: This approach uses regular expressions to match patterns in strings. In this case, we're using the `/<[^>]+>/` pattern to match HTML tags.

**Pros and Cons**

1. **String.includes**:
	* Pros: Fast, lightweight, easy to use, and widely supported.
	* Cons: Can be slow for complex patterns or large datasets, as it uses a linear search algorithm.
2. **RegExp**:
	* Pros: Flexible, powerful, and efficient for complex patterns. Can also handle escape sequences and character classes.
	* Cons: More overhead due to the complexity of regular expressions, which can impact performance.

**Library and Purpose**

The `includes()` method is a built-in JavaScript function that searches for an element within a string. It's designed to be simple and efficient.

There are no external libraries used in this benchmark.

**Special JS Feature or Syntax**

None mentioned explicitly.

Now, let's examine the individual test cases:

1. **String.includes**: This test case uses `text.map(isPontiallyHTML1)`, which applies the `isPontiallyHTML1` function to each element of the `text` array using the `map()` method. The `isPontiallyHTML1` function checks for HTML tags in a string by calling `includes('<') && includes('>')`.
2. **RegExp**: This test case uses `text.map(isPontiallyHTML2)`, which applies the `isPontiallyHTML2` function to each element of the `text` array using the `map()` method. The `isPontiallyHTML2` function checks for HTML tags in a string by calling `/<[^>]+>/`.test(text).

**Other Alternatives**

For regular expression-based approaches, other alternatives include:

* `String.match()`: Returns an array of matches or `null` if no match is found.
* `String.replace()`: Replaces occurrences of a pattern within the string.

For built-in string methods like `includes()`, other alternatives might be:

* Using a library like Lodash (which has its own `string.includes()` function)
* Implementing a custom linear search algorithm

However, keep in mind that these alternatives may not offer significant performance improvements or changes to the behavior compared to the original implementation.

Related benchmarks:

regexp vs string.includes (version: 0)

Comparing performance of: String.includes vs RegExp

Created: 6 years ago by: Registered User

Jump to the latest result

String.includes

RegExp

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):