Benchmark: hayato algorithms

Script Preparation code:

let endPos, endChar;

function reversify1(str, n = 0) {
    if (n >= Math.floor(str.length / 2)) return str;

    str = str.split('');
    endPos = str.length - 1 - n;
    endChar = str[endPos];
    str[endPos] = str[n];
    str[n] = endChar; // make first char the last char
    str = str.join('');
    return reversify1(str, n + 1);
}

function reversify2(str, n = 0) {
    if (n >= Math.floor(str.length / 2)) return str;

    endPos = str.length - 1 - n;
    return reversify2(str.substring(0, n) + str[endPos] + str.substring(n + 1, endPos) + str[n] + str.substring(endPos + 1), n + 1);
}

Tests:

split
reversify1("hello world");
substring
reversify2("hello world");

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
substring

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 JSON and explain what's being tested.

**Benchmark Definition**

The benchmark definition is a JSON object that represents a JavaScript microbenchmark. It contains two functions: `reversify1` and `reversify2`. These functions are designed to reverse the order of characters in a given string.

**Function Purpose**

Both functions take a string as input and return the reversed string. However, they use different approaches:

* `reversify1` uses a recursive approach, where it splits the string into an array, reverses the array, and then joins it back together.
* `reversify2` uses a non-recursive approach, where it creates three substrings: one from the beginning of the string to the middle, one from the end of the string to the middle, and one that combines these two parts with the middle character in between. It then concatenates these substrings to form the reversed string.

**Library Used**

Neither `reversify1` nor `reversify2` uses any external libraries. They are standalone JavaScript functions.

**Options Compared**

The benchmark is comparing two options:

* **Split and Join**: This approach involves splitting the string into an array, reversing the array, and then joining it back together.
* **Substring Manipulation**: This approach involves creating three substrings and concatenating them to form the reversed string.

**Pros and Cons of Each Approach**

**Split and Join:**

Pros:

* Simple and straightforward implementation
* Can be optimized for performance

Cons:

* May incur overhead due to array splitting and joining

**Substring Manipulation:**

Pros:

* Can be optimized for performance by avoiding unnecessary string creation
* May have better cache locality due to substring manipulation

Cons:

* More complex implementation compared to split and join approach
* May have more opportunities for error due to multiple substrings

**Other Considerations**

* The benchmark is running on a Chrome 100 browser on a Mac OS X 10.15.7 platform, which may influence the results.
* The benchmark is executed at a high frequency (625292 executions per second), which may put additional stress on the system.

**Alternative Approaches**

There are other approaches to reversing a string in JavaScript, such as using `Array.prototype.reverse()` or creating a custom iterator. However, these approaches may have different trade-offs in terms of performance and complexity.

For example, using `Array.prototype.reverse()` would require converting the string into an array, which could incur additional overhead. On the other hand, creating a custom iterator could provide better performance but would require more complex implementation.

In general, the choice of approach depends on the specific use case, performance requirements, and personal preference.

Related benchmarks:

hayato algorithms (version: 0)

asdf

Comparing performance of: split vs substring

Created: 4 years ago by: Guest

Jump to the latest result

split

substring

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):