Benchmark: Quick regex test thing

Script Preparation code:

var str = 'test script test script test script test script test script';

Tests:

Regex
str.replace(/script/g, "test");
Split and Replace
str.split("script").join("test");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Regex
Split and Replace

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 23 days ago):

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

**What is being tested?**

The provided JSON represents two JavaScript microbenchmarks, each with its own script preparation code and test case. The first test case uses the `replace()` method to replace all occurrences of the string "script" with the string "test". The second test case uses a combination of `split()` and `join()` methods to achieve the same result.

**Options being compared**

In this benchmark, two approaches are being compared:

1. **Regular Expressions (Regex)**: Using the `replace()` method with a regular expression to replace all occurrences of the string "script" with the string "test".
2. **String Split and Join**: Using the `split()` method to split the string into an array of substrings, then using the `join()` method to concatenate those substrings with the string "test".

**Pros and Cons**

**Regex Approach:**

Pros:

* Can handle complex patterns and replacements
* Can be faster than simple string manipulation approaches

Cons:

* Can be slower for simple cases due to the overhead of parsing regular expressions
* May have performance issues if the pattern is too complex or the input data is very large

**String Split and Join Approach:**

Pros:

* Can be faster than regex approach, especially for simple cases
* More predictable performance since it involves only basic string operations

Cons:

* May not work as well with complex patterns or edge cases
* Can be slower if the input data is too large or complex

**Library usage**

None of the provided test cases use any external libraries.

**Special JavaScript features**

None of the provided test cases use special JavaScript features such as async/await, promises, or modern syntax like arrow functions or destructuring. However, it's worth noting that some browsers may optimize certain JavaScript features for performance.

**Alternatives**

For this specific benchmark, alternatives to these approaches would be:

1. Using a library like `jsregex` which provides a fast and efficient regex implementation in JavaScript.
2. Using a different string manipulation approach, such as using the `substring()` method or regular expressions with string replacement.

However, since the goal of this benchmark is to compare the performance of simple string manipulation approaches (split and replace vs. regex), these alternatives might not be applicable.

Keep in mind that browser-specific optimizations and caching may also affect the results of this benchmark.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0

Browser/OS: Firefox 68 on Windows

View result in a separate tab

Test name	Executions per second
Regex	2211153.0 Ops/sec
Split and Replace	27366732.0 Ops/sec

Related benchmarks:

Quick regex test thing (version: 0)

Comparing performance of: Regex vs Split and Replace

Created: 5 years ago by: Guest

Jump to the latest result

Regex

Split and Replace

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 23 days ago):