Benchmark: includes vs regex

Script Preparation code:

var str = `Find out how to improve the speed of your web application!

Create a benchmark, measure performance " of the JavaScript code and pick the fastest version.

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Tests:

includes
str.includes('"') str.includes('@')
regex
/"/.test(str); /@/.test(str)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
includes
regex

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/113.0

Browser/OS: Firefox 113 on Ubuntu

View result in a separate tab

Test name	Executions per second
includes	20137266.0 Ops/sec
regex	10593101.0 Ops/sec

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's being tested.

**Benchmark Overview**

The benchmark compares the performance of two approaches to check if a substring exists in a string:

1. **`includes()` method**: A built-in JavaScript method that searches for a specified value within a string and returns `true` if it's found.
2. **Regular Expressions (`/regex`)**: A way to search for patterns in strings using special syntax.

**Options Compared**

The benchmark is comparing the performance of two options:

1. `includes()`: The built-in JavaScript method.
2. `/regex`: Using regular expressions to achieve the same result as the `includes()` method.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

* **`includes()` Method**:
	+ Pros: Simple, efficient, and widely supported by browsers.
	+ Cons: May not be suitable for complex string patterns or non-ASCII characters.
* `/regex`:
	+ Pros: Flexible, powerful, and works well with complex patterns. However, it may be slower than the `includes()` method due to additional overhead.
	+ Cons: Steeper learning curve, requires proper escaping and handling of edge cases.

**Library Used (in this case)**

There is no explicit library mentioned in the benchmark definition or test cases. The built-in JavaScript `includes()` method is being compared against regular expressions.

**Special JS Feature/Syntax**

The benchmark doesn't use any special JavaScript features or syntax that would require additional explanation.

**Other Alternatives**

If you're looking for alternative approaches to check if a substring exists in a string, some options include:

* Using the `indexOf()` method with a negative index to search from the end of the string.
* Implementing a custom algorithm using bitwise operations and looping through the string characters.
* Utilizing a library like `string-parsers` or `regex-ast` for more complex patterns.

However, for most use cases, the built-in `includes()` method or regular expressions will be sufficient.

Related benchmarks:

includes vs regex (version: 0)

Comparing performance of: includes vs regex

Created: 2 years ago by: Registered User

Jump to the latest result

includes

regex

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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