Benchmark: Trimming leading/trailing characters array

Script Preparation code:

var TestString = '-=+'.repeat(200) + '='.repeat(20000) + '=+-'.repeat(200);

function indexTrim(str, ch) {
    var start = 0, 
        end = str.length;

    while(start < end && ch.includes(str[start]))
        ++start;

    while(end > start && ch.includes(str[end - 1]))
        --end;

    return (start > 0 || end < str.length) ? str.substring(start, end) : str;
}
function indexTrimSingle(str, ch) {
    var start = 0, 
        end = str.length;

    while(start < end && str[start] === ch)
        ++start;

    while(end > start && str[end - 1] === ch)
        --end;

    return (start > 0 || end < str.length) ? str.substring(start, end) : str;
}

Tests:

Index Version (Jason Larke) (with array)
indexTrim(TestString, ['+','=','-']);
Index Version (Jason Larke)
indexTrimSingle(TestString, '-');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Index Version (Jason Larke) (with array)
Index Version (Jason Larke)

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the provided benchmark and its components.

**Benchmark Definition JSON**

The provided JSON represents a JavaScript microbenchmark. It defines two test cases:

1. **Trimming leading/trailing characters array**: This is the main benchmark that is being tested. The script preparation code defines two functions: `indexTrim` and `indexTrimSingle`. These functions trim leading and trailing characters from an input string using an index-based approach.
2. **Individual test cases**: There are two individual test cases:
	* **Index  Version (Jason Larke) (with array)**: This test case uses the `indexTrim` function with an array of characters as the second argument.
	* **Index  Version (Jason Larke)**: This test case uses the `indexTrimSingle` function without any additional arguments.

**Options Compared**

The benchmark compares two options:

1. **Using an array of characters**: The first test case uses an array of characters (`['+', '=', '-']`) as the second argument to the `indexTrim` function.
2. **Not using an array of characters**: The second test case does not pass any additional arguments to the `indexTrimSingle` function.

**Pros and Cons**

The choice between these two options depends on the specific use case:

* **Using an array of characters**:
	+ Pros: This approach allows for easier configuration of the characters to trim, as it provides a clear and explicit way to specify the trimming characters.
	+ Cons: This approach may introduce additional overhead due to the creation of the array, which can impact performance.
* **Not using an array of characters**:
	+ Pros: This approach avoids the potential overhead of creating an array, which can result in better performance.
	+ Cons: This approach requires more configuration and explicit specification of the trimming characters, which can lead to errors or inconsistencies.

**Library**

The `indexTrim` function uses a library called **Array.prototype.includes()**, which is a built-in JavaScript method that checks if a value exists in an array. The `includes()` method is used to trim leading and trailing characters from the input string by checking for each character's presence in the specified array.

**Special JS Feature or Syntax**

The benchmark does not use any special JavaScript features or syntax, such as async/await, Promises, or ES6+ features like arrow functions or destructuring. The code is written in traditional JavaScript style.

**Other Alternatives**

If you wanted to test similar benchmarks, you could consider the following alternatives:

1. **Trimming characters from an input string using a regex**: This approach would use regular expressions to trim leading and trailing characters from the input string.
2. **Using a different trimming algorithm**: You could explore alternative trimming algorithms, such as using a Boyer-Moore or Rabin-Karp algorithm for string matching.

Keep in mind that these alternatives might not be directly comparable to the provided benchmark, as they may have different performance characteristics and use cases.

Related benchmarks:

Trimming leading/trailing characters array (version: 0)

Comparing performance of: Index Version (Jason Larke) (with array) vs Index Version (Jason Larke)

Created: 2 years ago by: Guest

Jump to the latest result

Index Version (Jason Larke) (with array)

Index Version (Jason Larke)

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):