Benchmark: str.match vs str.Split3322

Script Preparation code:

string = "This is a benchmark to test if matching a regex is faster that splitting a string";
regex = /\S+/gi;

Tests:

String.split
string.split(regex).filter(x => x)
Regex.match
string.match(regex)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
String.split
Regex.match

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/112.0.0.0 Safari/537.36

Browser/OS: Chrome 112 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
String.split	2003664.1 Ops/sec
Regex.match	1983880.1 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON to understand what is being tested.

**Benchmark Definition**

The website MeasureThat.net is comparing two approaches: using `String.prototype.split()` with a regular expression (regex) and using `String.prototype.match()` with a regex.

In this specific benchmark, the string being split is `"This is a benchmark to test if matching a regex is faster that splitting a string"`. The regex `/\\S+/gi` is used to match one or more non-space characters globally (i.e., also matches at the end of the string). The `filter()` method is used to remove empty strings from the resulting array.

**Options Compared**

The two options being compared are:

1. **String.split() with regex**: This approach uses the `split()` method with a regex to split the string into an array. The regex `/\\S+/gi` is used to match one or more non-space characters globally.
2. **Regex.match() without splitting**: This approach uses the `match()` method with the same regex to find matches in the entire string, but does not return any values.

**Pros and Cons of Each Approach**

1. **String.split() with regex**:
	* Pros: Fast, as it only iterates over the characters of the string once.
	* Cons: Requires creating an array, which can be memory-intensive for large strings.
2. **Regex.match() without splitting**:
	* Pros: Does not require creating an array, making it more memory-efficient.
	* Cons: May be slower than `String.split()` with regex, as it needs to iterate over the entire string.

**Library and Purpose**

There is no library being used in this benchmark. However, the regex `/\\S+/gi` is a standard JavaScript regex that matches one or more non-space characters globally.

**Special JS Feature or Syntax**

No special JavaScript features or syntax are being tested or utilized in this benchmark.

**Other Alternatives**

Some alternative approaches to compare with `String.split()` and `Regex.match()` could be:

* Using `Array.prototype.reduce()` instead of `filter()`
* Using a library like Lodash's `string.split()` function, which may optimize the splitting process
* Using a different regex or optimization technique to improve performance

It's worth noting that the benchmark is comparing two approaches within the JavaScript standard library. If you were to explore alternative languages or libraries for string manipulation and processing, the options might be different.

Overall, this benchmark provides a simple yet useful comparison between two common string manipulation techniques in JavaScript: `String.split()` with regex and `Regex.match()`.

Related benchmarks:

str.match vs str.Split3322 (version: 0)

Test String.match with regex against String.split with string. We are splitting a string at the spaces.

Comparing performance of: String.split vs Regex.match

Created: one year ago by: Guest

Jump to the latest result

String.split

Regex.match

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):