Benchmark: RegEx.test vs. String.includes vs. String.match (multiple words in regex)

Script Preparation code:

var string = "Hello world!";
var regex = /Hello|world/;

Tests:

RegEx.test
regex.test(string);
String.includes
string.includes("Hello");
String.match
string.match("Hello");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
RegEx.test
String.includes
String.match

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 what's being tested in the provided JSON.

**Benchmark Definition**

The benchmark is designed to compare three different approaches for searching multiple words within a string: `regex.test()`, `string.includes()`, and `string.match()`.

**Options Compared**

1. **regex.test()**: This method uses regular expressions (RegEx) to search for patterns in the input string.
2. **string.includes()**: This method searches for a substring within the input string using the `includes()` method.
3. **string.match()**: This method searches for a pattern within the input string using regular expressions, similar to `regex.test()`.

**Pros and Cons of Each Approach**

1. **regex.test()**:
	* Pros: Can search for multiple patterns in the same operation, provides more control over matching (e.g., flags like `g` for global matches).
	* Cons: Can be slower than other methods due to the complexity of regular expression matching.
2. **string.includes()**:
	* Pros: Fast and simple to use, suitable for searching a single word or phrase.
	* Cons: Can be slow when searching multiple words or phrases, as it needs to perform separate searches.
3. **string.match()**:
	* Pros: Provides more control over matching than `includes()` (e.g., flags like `g`), similar to `regex.test()`.
	* Cons: Similar to `regex.test()`, can be slower due to the complexity of regular expression matching.

**Library Used**

None explicitly mentioned, but all three methods rely on JavaScript's built-in string and RegExp functionality.

**Special JS Feature or Syntax**

No special JS features or syntax are used in this benchmark. All operations are standard JavaScript functions.

**Other Considerations**

When choosing between these approaches, consider the specific requirements of your use case:

* If you need to search for multiple words within a single operation, `regex.test()` might be the best choice.
* For simple searches of a single word or phrase, `string.includes()` could be sufficient.
* When searching for multiple patterns in different parts of the input string, `string.match()` might provide better control.

**Alternatives**

Other alternatives to these methods include:

* Using a dedicated library like `unicode-matcher` for Unicode-aware matching.
* Implementing custom search algorithms using bitwise operations or other low-level techniques.
* Using a programming language with built-in support for regular expressions (e.g., Perl) if the performance difference is significant.

For most use cases, however, the standard JavaScript functions will provide sufficient performance and flexibility.

Related benchmarks:

RegEx.test vs. String.includes vs. String.match (multiple words in regex) (version: 0)

Comparing performance of: RegEx.test vs String.includes vs String.match

Created: 3 years ago by: Guest

Jump to the latest result

RegEx.test

String.includes

String.match

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):