Benchmark: string to array - MeasureThat.net

Script Preparation code:

var s = "adFNADf<.;2ksdnfo3.neofief0ipj";

Tests:

split
s.split('');
spread
[...s];
array from
Array.from(s);
object assign
Object.assign([], s);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
spread
array from
object assign

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.

I'd be happy to explain the benchmark and its results.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmarking framework, MeasureThat.net. The goal of this benchmark is to compare the performance of different approaches for converting a string to an array in JavaScript.

**Options Compared**

The benchmark compares four different methods:

1. **split()**: This method uses the `split()` function with an empty string as the separator, effectively splitting the input string into an array.
2. **spread()**: This method uses the spread operator (`[...s]`) to convert the string into an array.
3. **Array.from(s)`: This method uses the `Array.from()` function to create a new array from the input string.
4. **Object.assign([], s)`: This method uses the `Object.assign()` function to convert the string into an array.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. **split()**: Fast, but assumes that the input string is properly formatted (i.e., it doesn't contain any null characters).
	* Pros: fast, simple to implement.
	* Cons: may not work correctly for all inputs.
2. **spread()**: Simple, intuitive syntax, and works well for most cases.
	* Pros: easy to read, works well for most inputs.
	* Cons: slower than `split()` for large inputs.
3. **Array.from(s)`: Creates a new array, which can be slower than the other options.
	* Pros: safe and flexible way to create arrays from strings.
	* Cons: slower than some of the other options.
4. **Object.assign([], s)**: Only works on modern browsers that support `Object.assign()`.
	* Pros: non-destructive, works well for most inputs.
	* Cons: slower than some of the other options, requires modern browser support.

**Libraries and Special Features**

None of the benchmark's test cases rely on any specific libraries or special JavaScript features beyond what's available in a standard browser.

**Other Considerations**

When comparing the performance of these methods, it's essential to consider factors such as:

* Input size: The larger the input string, the more significant the performance differences between the different methods.
* Browser support: Some methods may only work on modern browsers that support specific features or functions.
* Memory usage: Creating new arrays can be memory-intensive, especially for large inputs.

**Alternatives**

Other alternatives to these methods include:

1. **String.prototype.split()**: This method is similar to `split()` but uses the `split()` function directly on the string object.
2. **Array.from(s, c => c)`: This method creates a new array by iterating over each character in the input string and returning it.

Keep in mind that these alternatives may have different performance characteristics or use more memory than some of the options listed above.

Related benchmarks:

string to array (version: 0)

Comparing performance of: split vs spread vs array from vs object assign

Created: 3 years ago by: Guest

Jump to the latest result

split

spread

array from

object assign

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):