Benchmark: r v s bench2 - MeasureThat.net

Tests:

regex replace all
const term1 = 'The quick brown fox The quick brown fox'; const regex = /[ ]{2,}/gi; const term2 = term1.replaceAll(regex, " ");
split filter join
const term1 = 'The quick brown fox The quick brown fox'; const term2 = term1.split(' ').filter(el => el.length > 1).join(' ');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex replace all
split filter join

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

LLMs can make mistakes. Check important info.

I'll break down the test cases and explain what's being tested, compared, and the pros/cons of each approach.

**Benchmark Definition**

The benchmark definition is a JSON object that provides metadata about the benchmark. In this case, it only contains basic information:

* `Name`: The name of the benchmark.
* `Description`: An empty description, which is not very informative.
* `Script Preparation Code` and `Html Preparation Code`: Both are empty, indicating that no specific code needs to be executed before running the benchmark.

**Individual Test Cases**

There are two test cases:

1. **Regex Replace All**
	* Benchmark Definition: A JavaScript snippet that creates a regular expression to replace consecutive whitespace characters (`[ ]{2,}`) with a single space (`\" \")` in a string.
	* Purpose: To measure the performance of replacing all consecutive whitespace characters in a string using the `replaceAll()` method.
2. **Split, Filter, Join**
	* Benchmark Definition: A JavaScript snippet that splits a string into an array of words, filters out words with less than 2 characters, and then joins the remaining words back into a single string.
	* Purpose: To measure the performance of splitting a string into an array, filtering the array, and joining it back into a single string.

**Library Used**

In both test cases, no specific libraries are used. However, it's likely that JavaScript's built-in `String` methods (`replaceAll()`, `split()`, and `join()`) are being tested.

**Special JS Features/Syntax**

None of the test cases use any special JavaScript features or syntax that require explanation. They only employ basic string manipulation operations using standard JavaScript methods.

**Other Alternatives**

To measure similar performance, you could consider other approaches:

1. **Using a different regular expression engine**: Some engines, like `RegExp` in Node.js, may perform differently than the built-in JavaScript `RegExp`.
2. **Changing the filtering condition**: Instead of removing words with less than 2 characters, you could test with a different filtering condition or use a more efficient algorithm.
3. **Using a custom implementation**: You could implement the string manipulation operations from scratch using low-level browser APIs (e.g., `DOMStringParser`) to see how they compare to JavaScript's built-in methods.

**Pros and Cons of Each Approach**

Here are some pros and cons for each approach:

* **Regex Replace All**
	+ Pros: Simple, straightforward implementation.
	+ Cons: May not be as efficient as other approaches due to the overhead of regular expressions.
* **Split, Filter, Join**
	+ Pros: Can be more efficient than regex-based approaches since it avoids creating a temporary regular expression object.
	+ Cons: Requires an additional array operation and joining step, which can add complexity.

Keep in mind that these are just general pros and cons, and the actual performance differences may vary depending on the specific browser, platform, and JavaScript engine used.

Related benchmarks:

r v s bench2 (version: 0)

Comparing performance of: regex replace all vs split filter join

Created: 5 years ago by: Guest

Jump to the latest result

regex replace all

split filter join

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):