Benchmark: RegEx.test vs. String.includes vs. String.match on userAgent 2

Script Preparation code:

var string = "Mozilla/5.0 (iPhone; CPU iPhone OS 13_2_3 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.0.3 Mobile/15E148 Safari/604.1";
var regex = /Android|webOS|iPhone|iPad|iPod|BlackBerry|IEMobile|Opera Mini\/i/;

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

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Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):

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Let's dive into the details of this benchmark.

**What is being tested?**

This benchmark compares the performance of three different methods for searching a string in JavaScript:

1. `regex.test()`: This method uses a regular expression to search for a pattern within a string. In this case, it's looking for any of the following strings: "Android", "webOS", "iPhone", "iPad", "iPod", "BlackBerry", or "IEMobile" (followed by "Opera Mini").
2. `string.includes()`: This method checks if a specific substring ("Hello") exists within the original string.
3. `string.match()`: This method also uses regular expressions to search for a pattern within a string, but it returns an array of matches instead of a boolean value.

**Test case details**

The benchmark defines three test cases:

1. **RegEx.test**: This test case uses a regular expression to match any of the specified strings in the `userAgent` string.
2. **String.includes**: This test case simply checks if the substring "Hello" exists within the `userAgent` string using the `includes()` method.
3. **String.match**: This test case also uses a regular expression to match any of the specified strings, but it returns an array of matches instead of a boolean value.

**Library and special JS feature/syntax**

There is no external library being used in this benchmark.

The `regex` variable is created using the `/.../i` syntax, which defines a regular expression pattern with case-insensitive matching. The `test()` method is called on the resulting regex object to perform the match.

**Pros and cons of each approach**

Here's a brief summary:

* **RegEx.test()**: This method is efficient when searching for specific patterns in strings. However, it might be slower than other methods if you're searching for simple substrings.
	+ Pros: Good performance, flexible pattern matching
	+ Cons: Might be slower for simple substring searches
* **String.includes()**: This method is simple and easy to use when checking if a substring exists within another string. However, it's less flexible than `regex.test()` since you can't search for complex patterns.
	+ Pros: Simple to use, fast for simple substring searches
	+ Cons: Limited pattern matching capabilities
* **String.match()**: This method is similar to `regex.test()`, but it returns an array of matches instead of a boolean value. It's useful when you need to retrieve all matches, but it might be slower than other methods.
	+ Pros: Good performance, flexible pattern matching, and returns multiple matches
	+ Cons: Might be slower for simple substring searches

**Other alternatives**

If you need more advanced string search capabilities, consider using a dedicated library like `regexpp` or `js-regex`. These libraries provide better performance and features than the built-in JavaScript methods.

For simple substring searches, you can also use the `indexOf()` method, which is similar to `string.includes()`, but it returns the index of the first match instead of a boolean value.

Keep in mind that the best approach depends on your specific requirements and the complexity of the patterns you're searching for.

Related benchmarks:

RegEx.test vs. String.includes vs. String.match on userAgent 2 (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 llama3.1:latest, generated one year ago):