Benchmark: Array from vs string split (with string transform)

Script Preparation code:

var s1 = 123;
var s2 = 12345;

Tests:

Array.from
let n1 = Array.from(s1 + ''); let n2 = Array.from(s2 + '');
string split
let n1 = (s1 + '').split(''); let n2 = (s2 + '').split('');

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.from
string split

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 break down the provided benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark measures the performance of two JavaScript methods: `Array.from()` and string splitting using the `split()` method, both applied to concatenate strings with an integer value (`s1` or `s2`) as a prefix.

**Options Compared**

Two options are compared:

1. **`Array.from()`**: This method creates a new array from an iterable (in this case, a string) by splitting it into individual elements and wrapping each element in an array.
2. **String Splitting (`split()`)**: This method splits a string into an array of substrings using a specified separator.

**Pros and Cons**

*   `Array.from()`: Pros:
    *   More efficient when working with large datasets, as it avoids the overhead of creating multiple intermediate arrays during splitting.
    *   Can be more readable and maintainable for complex data processing tasks.
*   String Splitting (`split()`): Pros:
    *   Often faster and more lightweight than `Array.from()`, making it suitable for small-scale string manipulation tasks.
    *   More straightforward to implement and understand, especially for simple splitting scenarios.

Cons:

*   `Array.from()`: Cons:
    + Requires creating an array of the desired length, which can be memory-intensive for large datasets.
    + May incur additional overhead due to array creation and processing.
*   String Splitting (`split()`): Cons:
    + Can lead to fragmentation or memory issues if used with very large strings or inefficient separator choices.
    + May not be as flexible or maintainable as `Array.from()` for complex data processing tasks.

**Library and Syntax**

There are no libraries explicitly mentioned in the provided benchmark, but it's worth noting that both methods rely on JavaScript's built-in string manipulation capabilities. The syntax is straightforward and easily understandable by most software engineers familiar with JavaScript basics.

**Special JS Feature or Syntax**

None of the tested methods rely on any special JavaScript features or syntax beyond standard string concatenation, iteration, and array creation. However, if you're interested in exploring these topics further:

*   You can learn more about `Array.from()` and its usage in various scenarios.
*   String splitting with separators is a fundamental concept in JavaScript string manipulation.

**Alternatives**

Some alternative approaches for achieving similar results could include:

1.  Using other array creation methods (e.g., `Array`, `set`): These alternatives may offer different performance characteristics, but they are not explicitly covered by the benchmark.
2.  Employing custom string parsing algorithms: Depending on your specific use case, a tailored algorithm might provide better performance or maintainability.

However, keep in mind that these alternatives may deviate from standard JavaScript best practices and might require more expertise to implement effectively.

By understanding what's being tested and considering the pros and cons of each approach, you can better choose the most suitable method for your specific use case.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36

Browser/OS: Chrome 90 on Windows

View result in a separate tab

Test name	Executions per second
Array.from	869002.3 Ops/sec
string split	1472791.4 Ops/sec

Related benchmarks:

Array from vs string split (with string transform) (version: 0)

Comparing performance of: Array.from vs string split

Created: 3 years ago by: Guest

Jump to the latest result

Array.from

string split

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):