Benchmark: test regex vs match vs includes

Script Preparation code:

var num = "1.899999999996"

Tests:

regex
/^\d+\.\d{3,}$/.test(num)
includes
num.includes('.')
match
num.match('.')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex
includes
match

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 23 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36

Browser/OS: Chrome 134 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
regex	18377220.0 Ops/sec
includes	95900504.0 Ops/sec
match	5046630.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark JSON and individual test cases to understand what's being tested.

**Benchmark Overview**

The benchmark is designed to compare the performance of three different methods: `includes()`, `regex` using the `/test()` method, and `match()` with a regular expression. The goal is to determine which method is the fastest for this specific use case.

**Script Preparation Code**

The script preparation code defines a variable `num` containing a decimal number in string format: `"1.899999999996"`.

**Individual Test Cases**

There are three test cases:

1. **Regex**
	* `Benchmark Definition`: `/^\\d+\\.\\d{3,}$/.test(num)`
	* Purpose: This regular expression checks if the input string starts with a digit followed by a decimal point and exactly 3 more digits.
2. **Includes**
	* `Benchmark Definition`: `num.includes('.')`
	* Purpose: This method checks if the input string contains a specific character (in this case, the dot `'.'`).
3. **Match**
	* `Benchmark Definition`: `num.match('.')`
	* Purpose: This method searches for a specific pattern in the input string (in this case, the dot `'.'`) and returns an array of matches or `null` if no match is found.

**Library Used**

None.

**Special JavaScript Features/Syntax**

There are no special features or syntax used in these test cases.

Now, let's discuss the pros and cons of each approach:

1. **Regex**
	* Pros: Regular expressions can be powerful and flexible for pattern matching.
	* Cons:
		+ Can be slower than other methods due to the overhead of compiling and executing regular expressions.
		+ May have a higher memory footprint due to the need to store the compiled regex pattern.
2. **Includes**
	* Pros: The `includes()` method is generally faster than regular expressions, as it uses a simple string search.
	* Cons:
		+ May not be suitable for complex string searches or pattern matching.
3. **Match**
	* Pros:
		+ Similar to the `includes()` method, but can also handle more complex patterns using regular expression syntax.
	* Cons:
		+ Requires explicit compilation of the regex pattern, which may add overhead.

**Alternative Approaches**

Other alternatives for this benchmark could include:

1. Using a dedicated string search library or function (e.g., `String.prototype.indexOf()` or `String.prototype.startsWith()`).
2. Implementing a custom pattern matching algorithm using techniques like Boyer-Moore or Knuth-Morris-Pratt.
3. Comparing the performance of different JavaScript engines or versions.

However, it's worth noting that the `includes()` method and regular expressions are both widely supported in modern JavaScript environments, making them suitable for this benchmark.

Related benchmarks:

test regex vs match vs includes (version: 0)

Comparing performance of: regex vs includes vs match

Created: one year ago by: Guest

Jump to the latest result

regex

includes

match

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 6 months ago):