Benchmark: string char delete perfomance

Script Preparation code:

let str = '100%';

Tests:

regex
let str = '100%'; str.replace(/%/g, '');
slice
let str = '100%'; str.slice(0, -1);
array
let str = '100%'; str[str.length - 1] = '';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
regex
slice
array

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Overview**

The provided JSON represents a benchmark test suite that compares the performance of three different approaches:

1. **Regex**: Using regular expressions to replace a specific character (`%`) from a string.
2. **Slice**: Using the `slice()` method to extract a substring from a string, starting from the beginning and ending at a specified index (in this case, one less than the length of the string).
3. **Array**: Directly accessing an element in an array using its index.

**Comparison Options**

The three approaches have different pros and cons:

* **Regex**:
	+ Pros: Flexible and powerful for pattern matching.
	+ Cons: Can be slower due to the overhead of compiling regular expressions, and may not perform well with large strings or complex patterns.
* **Slice**: 
	+ Pros: Efficient for extracting a substring from a string, as it creates a new array object without modifying the original string.
	+ Cons: May require additional memory allocation if the resulting substring is larger than the original string.
* **Array**:
	+ Pros: Direct access to individual elements in an array can be fast and efficient.
	+ Cons: Assumes the element exists at the specified index, which may not always be the case.

**Library Usage**

None of the test cases use a library, but they do rely on built-in JavaScript features:

* **Regex**: The `RegExp` object is used implicitly by passing a regular expression pattern as a string.
* **Slice**: The `Array.prototype.slice()` method is called on an array-like object (the original string).
* **Array**: Direct access to individual elements in an array uses the indexing syntax (`str[str.length - 1] = '';`).

**Special JavaScript Features or Syntax**

None of the test cases use any special JavaScript features or syntax that would require additional explanation.

**Other Alternatives**

If you're interested in exploring alternative approaches, here are a few options:

* **String.prototype.replace()**: An alternative to `slice()` for replacing specific characters.
* **String.prototype.substring()**: Another alternative to `slice()` for extracting substrings from strings.
* **Using a library like Lodash or Ramda**: These libraries provide functional programming utilities that can be used to implement the benchmark tests, potentially leading to more efficient and concise code.

Overall, the provided benchmark test suite provides a useful comparison of three different approaches to string manipulation in JavaScript. By analyzing the results, developers can gain insights into the performance characteristics of each approach and make informed decisions about which one to use in their own projects.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/108.0.0.0 Safari/537.36

Browser/OS: Chrome 108 on Windows

View result in a separate tab

Test name	Executions per second
regex	8050436.5 Ops/sec
slice	775323008.0 Ops/sec
array	1688493.4 Ops/sec

Related benchmarks:

string char delete perfomance (version: 0)

Comparing performance of: regex vs slice vs array

Created: one year ago by: Guest

Jump to the latest result

regex

slice

array

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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