Benchmark: RegEx.test vs. String.includes vs. String.match with `[]`

Script Preparation code:

var string = "area_ids[]";
var regex = /\[\]/;

Tests:

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

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:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (X11; CrOS x86_64 14909.100.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36

Browser/OS: Chrome 104 on Chrome OS 14909.100.0

View result in a separate tab

Test name	Executions per second
RegEx.test	1819113.4 Ops/sec
String.includes	4524685.0 Ops/sec
String.match	1227836.6 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark compares the performance of three different approaches for searching for a pattern in a string:

1. `RegExp.test()`
2. `String.includes()`
3. `String.match()` with an array literal `[]`

These methods are used to search for a specific pattern or substring within a given string.

**Options Compared**

The benchmark compares the performance of these three approaches on the same input string:

* `RegEx.test()`: uses the `RegExp` object to test if the string matches the regular expression pattern.
* `String.includes()`: uses the `includes()` method to check if the string contains the specified substring or pattern.
* `String.match()`: uses the `match()` method with an array literal `[]` to search for the first occurrence of the pattern in the string.

**Pros and Cons of Each Approach**

1. **RegExp.test()**
	* Pros: more flexible and powerful, allows for regular expression syntax, can be used for matching patterns at the beginning or end of a string.
	* Cons: slower than `String.includes()` and `String.match()`, requires creating a RegExp object.
2. **String.includes()**
	* Pros: faster and more concise, only checks if the string contains the specified substring.
	* Cons: less flexible, may not match patterns at the beginning or end of a string, can be slow for large strings.
3. **String.match() with []**
	* Pros: similar to `RegExp.test()` but faster and more lightweight, allows for searching from the start of the string.
	* Cons: requires creating an array literal `[]`, may not match patterns at the end of a string.

**Library Used**

In this benchmark, no library is explicitly used. However, it's worth noting that `String.includes()` uses the `Intl` API under the hood to support Unicode character matching.

**Special JS Features or Syntax**

None mentioned in this specific benchmark, but it's worth noting that newer JavaScript features like async/await and modern ECMAScript versions (e.g., ES6+) might affect performance in different contexts.

**Other Alternatives**

If you need to search for a pattern in a string, consider the following alternatives:

* `String.indexOf()` or `String.lastIndexOf()`: similar to `String.includes()`, but searches from the start or end of the string respectively.
* `String.replace()`: not suitable for searching patterns, but can be used to replace substrings.
* Regular expression libraries like `regenerator` or third-party plugins like `regex-tester`.

Keep in mind that performance differences may vary depending on the specific use case and requirements.

As a general guideline, if you need flexibility and power, consider using `RegExp.test()`. For simple substring matching, `String.includes()` might be sufficient. If you need to search from the start of the string, `String.match([])` could be a good choice.

Related benchmarks:

RegEx.test vs. String.includes vs. String.match with `[]` (version: 0)

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>

Experimental features:

Fastest: N/A

Slowest: N/A

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