Benchmark: split vs regex onurl

Script Preparation code:

var url = "/something/somethingelse/morestuff/a?b=35";

Tests:

split
url.split("/");
regex
url.match(/\/([a-z_0-9]+)/ig)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
regex

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/113.0.0.0 Safari/537.36 OPR/99.0.0.0

Browser/OS: Opera 99 on Windows

View result in a separate tab

Test name	Executions per second
split	12259852.0 Ops/sec
regex	7476114.5 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON benchmark definition and test cases, explaining what's being tested, compared, and the pros/cons of each approach.

**Benchmark Definition**

The provided `Script Preparation Code` defines a URL string: `"var url = "/something/somethingelse/morestuff/a?b=35\";"`. This is used as input for both test cases.

**Test Cases**

There are two test cases:

1. **"split"`**
	* `Benchmark Definition`: `url.split("/");`
	* Purpose: Test the performance of string splitting using the `/` character.
2. **"regex"`**
	* `Benchmark Definition`: `url.match(/\\/([a-z_0-9]+)/ig);`
	* Purpose: Test the performance of regular expression matching on the same URL string.

**Options Compared**

In this benchmark, two options are being compared:

1. **String Splitting (`split()`)**: This method splits a string into an array of substrings using a specified separator (in this case, `/`).
2. **Regular Expression Matching (`match()`)**: This method searches a string for a match with the regular expression pattern and returns an array containing the matches.

**Pros and Cons**

**String Splitting (`split()`)**

Pros:

* Simple and efficient for simple string splitting scenarios.
* Fast execution time for small to medium-sized strings.

Cons:

* May not handle edge cases or complex string manipulation well.
* Can lead to performance issues with very large strings due to the overhead of creating an array of substrings.

**Regular Expression Matching (`match()`)**

Pros:

* Flexible and powerful for pattern matching, including regular expressions.
* Supports advanced features like capturing groups, anchors, and character classes.

Cons:

* Generally slower than string splitting for simple use cases.
* Can be resource-intensive for large strings or complex patterns due to the overhead of compiling and executing the regex.

**Library Usage**

In this benchmark, no external libraries are used. The `split()` method is a built-in JavaScript function, while the `match()` method uses the ECMAScript 1999 standard's string matching algorithm (which may be optimized by browsers).

**Special JS Features**

None of the test cases use special JavaScript features or syntax beyond what's required for string manipulation and regular expression matching.

**Alternatives**

If you're looking for alternatives to this benchmark, here are a few options:

1. **V8 Benchmark**: This benchmarking suite focuses on performance testing in various JavaScript engines, including V8 (used by Chrome).
2. **Benchmark.js**: A popular benchmarking library for JavaScript that provides a range of benchmarks and tools for measuring performance.
3. **JSPerf**: A simple benchmarking tool that allows you to compare the performance of different code snippets in a browser or Node.js environment.

Keep in mind that these alternatives may not provide an exact match for this specific benchmark, but they can help you explore other aspects of JavaScript performance and optimization.

Related benchmarks:

split vs regex onurl (version: 0)

Comparing performance of: split vs regex

Created: 4 years ago by: Guest

Jump to the latest result

split

regex

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):