Benchmark: Split vs Regex with prefix

Script Preparation code:

var testString = "some_prefix_value"

Tests:

Splitting
var values = testString.split("some_prefix_"); var value1 = values[0]; var value2 = values[1]; var value3 = values[2];
Regex
var regex = /\d+/g var value1 = regex[0]; var value2 = regex[1]; var value3 = regex[2];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Splitting
Regex

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/117.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 117 on Android

View result in a separate tab

Test name	Executions per second
Splitting	5531291.5 Ops/sec
Regex	31525300.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to help you understand the provided benchmark.

**Benchmark Overview**

The benchmark is designed to compare two approaches for extracting values from a string: using the `split()` method and regular expressions (regex). The test cases are identical, with the only difference being which approach is used to extract the values.

**Options Compared**

The two options compared in this benchmark are:

1. **Split() Method**: This method splits a string into an array of substrings based on a specified separator.
2. **Regular Expressions (Regex)**: This is a way of matching patterns in strings using a regular expression engine.

**Pros and Cons**

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

* **Split() Method**:
	+ Pros:
		- Simple and easy to use
		- Fast, since it uses a simple string splitting algorithm
	+ Cons:
		- Can be slow for large strings or complex separators
		- May not work correctly with special characters or edge cases
* **Regular Expressions (Regex)**:
	+ Pros:
		- Powerful and flexible pattern matching capabilities
		- Fast, since it uses a optimized regex engine
	+ Cons:
		- Steeper learning curve due to the complexity of regex syntax
		- May be slower than split() for simple string splitting tasks

**Library Used**

There is no explicit library mentioned in the benchmark definition or test cases. However, it's likely that the `split()` method and regex engine are part of the JavaScript language itself.

**Special JS Feature/Syntax**

There doesn't appear to be any special JavaScript feature or syntax used in this benchmark.

**Other Alternatives**

If you need alternative approaches for extracting values from a string, some other options might include:

* Using `String.prototype.replace()` method with a callback function
* Using `Array.prototype.map()` and `String.prototype.split()`
* Using a custom implementation of the split() method using a loop and substring concatenation

These alternatives may have different performance characteristics or trade-offs in terms of complexity and ease of use.

I hope this explanation helps!

Related benchmarks:

Split vs Regex with prefix (version: 0)

Comparing performance of: Splitting vs Regex

Created: 2 years ago by: Guest

Jump to the latest result

Splitting

Regex

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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