Benchmark: str.match vs str.Split jllj lpk

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(/|s/)
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: 2 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/127.0.0.0 Safari/537.36 Edg/127.0.0.0

Browser/OS: Chrome 127 on Linux

View result in a separate tab

Regex.match

640K/s

String.split

140K/s

View exact numbers

Test name	Executions per second
✓ Regex.match	639,814 Ops/sec
String.split	140,449 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 definition and test cases.

**Benchmark Definition**

The benchmark measures the performance difference between two string manipulation operations: `string.match()` with regular expressions (regex) against `string.split()`. The goal is to compare how fast each operation is for splitting a string at spaces.

**Script Preparation Code**

The script preparation code sets up the initial variables:

* `string`: a test string containing multiple words separated by spaces.
* `regex`: a regex pattern used in the `string.match()` method, which matches one or more non-space characters (`\\S+`) with the `i` flag for case-insensitive matching.

**Html Preparation Code**

There is no HTML preparation code provided, indicating that this benchmark focuses on JavaScript performance without considering other factors like DOM manipulation or UI rendering.

**Individual Test Cases**

The two test cases compare the performance of:

1. **String.split()**: using the `split()` method with a regex pattern (`/|\s/`).
2. **Regex.match()**: using the `match()` method with the predefined regex pattern (`regex`).

**Comparison of Options**

Here's a brief overview of each approach, their pros and cons:

1. **String.split()**
	* Pros:
		+ Often more efficient for simple string splitting tasks.
		+ Can be faster for very large strings since it doesn't create an array of matches like `match()` does.
	* Cons:
		+ Returns an array of matches, which might require additional processing or handling.
2. **Regex.match()**
	* Pros:
		+ More flexible and powerful for matching patterns, including regular expressions with groups, capturing, and flags.
		+ Can be faster when only one match is expected, as it avoids creating unnecessary arrays.
	* Cons:
		+ Can be slower due to the overhead of regex compilation and execution.

**Library Usage**

The benchmark uses the built-in `String.prototype.match()` method, which is a JavaScript standard library function. This method returns an array containing any matches or null if no match is found.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax used in this benchmark.

**Other Considerations**

When choosing between these two approaches, consider the following:

* If you need to split strings at specific positions (e.g., whitespace), `String.split()` might be a better choice.
* If you need to perform more complex pattern matching (e.g., regex with groups or capturing), `Regex.match()` is likely a better option.

**Alternatives**

Other alternatives for string splitting or pattern matching include:

* Using `String.prototype.replace()` with a callback function
* Utilizing third-party libraries like jQuery's `$.trim()` or other regex-heavy tools
* Implementing custom implementation using arrays and loops

Keep in mind that the choice of method depends on your specific requirements, performance constraints, and language features.

str.match vs str.Split jllj lpk (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: 2 years ago by: Guest

Go to the latest result

String.split

Regex.match

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

str.match vs str.Split jllj lpk (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: 2 years ago by: Guest

Go to the latest result

String.split

Regex.match

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `String.split vs Regex.match`