Benchmark: Compare string.split to a spread opperator

Script Preparation code:

var str = 'hello';

Tests:

split
var arr = str.split('');
spread
var arr = [...str];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
spread

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark is designed to compare the performance of two different ways to split a string: using the `split()` method with an empty string as the separator, and using the spread operator (`...`) to create a new array from the string characters.

**Options Compared**

There are only two options being compared:

1. **`split()```**: This is a built-in JavaScript method that splits a string into an array of substrings based on a specified separator. In this case, an empty string `''` is used as the separator.
2. **Spread Operator (`...`)```**: This operator creates a new array by taking the elements of an iterable (such as a string) and placing them in separate elements.

**Pros and Cons**

* **`split()```**: Pros:
	+ Well-established and widely supported method
	+ Can handle multiple separators with different lengths
	+ Easy to read and understand code
*   Cons:
	+ May be slower than the spread operator due to the overhead of creating an array
	+ Can lead to unexpected results if not used carefully (e.g., splitting on a single character)
* **Spread Operator (`...`)```**: Pros:
	+ Faster execution speed compared to `split()`
	+ More concise and readable code
	+ Handles multi-character separators easily
*   Cons:
	+ Less widely supported than `split()`, especially in older browsers
	+ May not work correctly with certain types of input (e.g., non-ASCII characters)

**Library Usage**

None of the test cases use any external libraries. The benchmark relies solely on built-in JavaScript features.

**Special JS Feature/Syntax**

The spread operator (`...`) is a relatively recent feature introduced in ECMAScript 2015 (ES6). It's used to create new arrays from existing iterables, and it's a popular choice for concise code.

**Other Alternatives**

If you wanted to compare the performance of `split()` with other methods, you could consider adding additional benchmark cases, such as:

* Using a regular expression (`RegExp`) to split the string
* Using a custom implementation of splitting (e.g., using a loop to create an array)
* Comparing the performance of different separator types (e.g., comma-separated values, semicolon-separated values)

However, for this specific benchmark, the spread operator and `split()` are the two most relevant options, making it a focused and efficient comparison.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36

Browser/OS: Chrome 91 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
split	6969563.0 Ops/sec
spread	9582564.0 Ops/sec

Related benchmarks:

Compare string.split to a spread opperator (version: 0)

Comparing performance of: split vs spread

Created: 7 years ago by: Guest

Jump to the latest result

split

spread

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):