Benchmark: array.split vs array.from

Script Preparation code:

var s1 = "foobar";
var s2 = "foo";

Tests:

Array.split
var n1 = s1.split(""); var n2 = s2.split("");
Array.from
var n1 = Array.from(s1); var n2 = Array.from(s2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.split
Array.from

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into explaining the benchmark.

The provided JSON represents two test cases: `array.split` and `array.from`. Both tests compare the performance of these two methods for splitting strings in JavaScript.

**What is being tested?**

*   In the `Script Preparation Code`, we have two string variables, `s1` and `s2`, initialized with the values `"foobar"` and `"foo"`, respectively.
*   The test cases create an array by splitting these strings using either `split()` or `Array.from()`.
*   The comparison is done between the two approaches: creating arrays from the split results of each string.

**Options compared**

The options being tested are:

1.  **`split()`**: This method splits a string into an array of substrings based on a specified separator.
2.  **`Array.from()`**: This method creates a new, shallow-copied Array instance from an iterable or an array-like object.

**Pros and Cons**

*   **`split()`**:
    *   Pros: Widely supported across browsers, efficient for large strings.
    *   Cons: Can be slower than `Array.from()` for smaller strings due to the overhead of parsing and generating the separator string.
*   **`Array.from()`**: 
    *   Pros: More modern approach, often faster than `split()`, especially for small to medium-sized strings.
    *   Cons: Less widely supported across older browsers.

**Library/ Library-less**

The test does not use any external libraries. Both `split()` and `Array.from()` are built-in JavaScript methods.

**Special JS Features/Syntax**

There is no specific JavaScript feature or syntax being tested in this benchmark. It's a simple, straightforward comparison of two string manipulation methods.

**Other Alternatives**

If you wanted to test other approaches for splitting strings, some alternatives could be:

*   Using regular expressions (`String.match()` or `RegExp.split()`)
*   Utilizing array iteration (`for...in` loop)
*   Leveraging the `String.prototype.replace()` method with a callback function
*   Employing the `Array.prototype.reduce()` method

Related benchmarks:

array.split vs array.from (version: 0)

Comparing performance of: Array.split vs Array.from

Created: 4 years ago by: Guest

Jump to the latest result

Array.split

Array.from

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):