Benchmark: Split vs RegEx Brackets

Script Preparation code:

function generateSamples(size) {
    const random = (min, max) => Math.floor(Math.random() * (max -min + 1) + min);
	const samples = [];
    for(let i = 0; i < size; i++) {
  		const type = random(1, 200);
  		const index = random(1, 200);
    	samples.push("T_" + type + "["+ index + "]");
    }
    return samples;
}
var samples = generateSamples(20000);

Tests:

Split
var values = samples.map(x => x.split("[")[0]);
RegEx
var values = samples.map(x => x.match(/T_\d+/)[0]);

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:

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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 definition is a JSON object that represents a JavaScript microbenchmark. It has three main components:

1. **Script Preparation Code**: This is a JavaScript function `generateSamples` that generates an array of 20,000 strings with random types (T_1 to T_200) and indices (1-200). The purpose of this code is to create a dataset for the benchmark.
2. **Html Preparation Code**: Since there is no HTML preparation code provided, it means that the benchmark does not require any HTML setup or rendering.

**Test Cases**

There are two individual test cases:

1. **Split**: This test case uses the `split()` method to extract the first character of each string in the generated dataset.
2. **RegEx**: This test case uses a regular expression (`/T_\\d+/`) to match and extract the strings that start with "T_" followed by a digit.

**Options Compared**

In this benchmark, two options are compared:

1. Using `split()` method
2. Using a regular expression (`/T_\\d+/`)

**Pros and Cons of Different Approaches**

Here's a brief analysis of each approach:

* **Split() Method**:
	+ Pros: Simple, easy to understand, and widely supported.
	+ Cons: May not be as efficient for very large datasets or complex patterns, as it creates multiple array elements.
* **Regular Expression (`/T_\\d+/`)**:
	+ Pros: Can handle more complex patterns and is often faster for very large datasets, as it only needs to execute a single regular expression match.
	+ Cons: May be less intuitive for some developers, especially those without prior experience with regular expressions.

**Library and Its Purpose**

There is no specific library mentioned in the benchmark definition. However, if we were to analyze the `generateSamples` function, we could argue that it's using a generic JavaScript utility function to generate random data.

**Special JS Feature or Syntax**

The test cases do not appear to use any special JavaScript features or syntax beyond the basic `split()` method and regular expressions.

Related benchmarks:

Split vs RegEx Brackets (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>

Fastest: N/A

Slowest: N/A

No previous run results

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