Benchmark: RegEx.test vs. String.includes vs. String.match (case-insensitive)

Script Preparation code:

var string = "Hello world!";
var regex = /.*Hello.*/i;

Tests:

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

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:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark tests three different approaches to search for a specific string within another string in JavaScript:

1. `String.includes()`
2. `RegEx.test()`
3. `String.match()` with case-insensitivity

**Approach 1: String.includes()**

`String.includes()` is a method that checks if a specified value exists in a given string. In this benchmark, it's used to search for the string "Hello" within the original string.

Pros:

* Easy to use and implement
* Fast and efficient
* Can be used with both case-sensitive and case-insensitive searches

Cons:

* Only returns whether the search string is found at least once in the entire string
* May not be suitable for more complex search patterns or regular expressions

**Approach 2: RegEx.test()**

`RegEx.test()` is a method that tests a regular expression against a string. In this benchmark, it's used to match the regular expression `/.*Hello.*/i`, which searches for any character (`.`) followed by "Hello" and then any character again.

Pros:

* More flexible and powerful than `String.includes()`
* Can handle more complex search patterns and regular expressions
* Returns a boolean value indicating whether the search string was found

Cons:

* Can be slower than `String.includes()` for simple searches
* Requires more knowledge of regular expressions to use effectively

**Approach 3: String.match() with case-insensitivity**

`String.match()` is a method that attempts to match a regular expression against a string. In this benchmark, it's used with the `i` flag at the end of the regular expression, making it case-insensitive.

Pros:

* Similar to `RegEx.test()`, but with less overhead
* Returns an array containing the matched values if found

Cons:

* Can be slower than `String.includes()` for simple searches
* Requires more knowledge of regular expressions to use effectively

**Library and Special Features**

In this benchmark, no libraries are explicitly mentioned. However, `RegEx.test()` uses the `RegExp` object, which is a built-in JavaScript object.

No special features or syntax are used in this benchmark.

**Alternatives**

Other alternatives for searching strings include:

* `String.prototype.startsWith()`, `String.prototype.endsWith()`: These methods can be used to check if a string starts or ends with a certain value.
* `Array.prototype.indexOf()`, `Array.prototype.lastIndexOf()`: These methods can be used to find the index of a specific value within an array.

Keep in mind that these alternatives may not provide the same functionality as `String.includes()` and `RegEx.test()`, but they can be useful in different scenarios.

Related benchmarks:

RegEx.test vs. String.includes vs. String.match (case-insensitive) (version: 0)

Case insensitive

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

Created: 2 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):