Benchmark: Array.fom(String) Vs. String.split('')

Script Preparation code:

var string = 'sddlfqsdfqdsjflqksjdfksdqjfjldskqklqsdfkkjlqsdfjmkireerzoznn';

Tests:

split
return string.split('');
Array.from
return Array.from(string);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
Array.from

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36

Browser/OS: Chrome 145 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
split	18056354.0 Ops/sec
Array.from	2928630.2 Ops/sec

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

LLMs can make mistakes. Check important info.

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

The provided JSON represents a JavaScript microbenchmark that compares two approaches to process strings: `String.split('')` and `Array.from(string)`.

**What's being compared?**

In this case, we're comparing the performance of two different methods to split or convert a string into an array:

1. **String.split('')**: This method takes a string (`''`) as an argument and returns an array containing the individual characters of the original string. The `' '` separator is used to split the string.
2. **Array.from(string)**: This method creates a new array from an iterable (in this case, a string). The `string` parameter is passed directly to the `from()` method, which converts it into an array.

**Options compared**

The benchmark is comparing two specific options:

1. `String.split('')`
2. `Array.from(string)`

These options are chosen because they both aim to achieve the same result (converting a string into an array), but use different approaches and may have varying performance characteristics.

**Pros and Cons of each approach**

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

1. **String.split('')**
	* Pros:
		+ Simple and widely supported
		+ Works with both single-character and multi-character separators
	* Cons:
		+ May be slower due to the overhead of creating an array from individual characters
		+ Can be less efficient for large strings or when using complex separators
2. **Array.from(string)**
	* Pros:
		+ More modern and efficient approach, especially for large strings
		+ Supports a wider range of separator types (e.g., regex patterns)
	* Cons:
		+ May not be supported by older browsers or JavaScript engines
		+ Requires careful handling of edge cases (e.g., null or undefined inputs)

**Library usage**

Neither `String.split('')` nor `Array.from(string)` rely on any external libraries, making them suitable for use in a variety of scenarios.

**Special JS features**

There are no specific special JavaScript features or syntax being tested in this benchmark. The focus is on the basic functionality and performance comparison between these two methods.

**Other alternatives**

If you're looking for alternative approaches to convert strings into arrays, some other options might include:

1. **Regexp.split()**: Similar to `String.split('')`, but uses regular expressions instead of a literal separator.
2. **String.matchAll()**: Returns an iterator over matches in the string, which can be converted to an array using methods like `Array.from()`.

Keep in mind that these alternatives may have different performance characteristics or require additional setup depending on your specific use case.

I hope this explanation helps!

Related benchmarks:

Array.fom(String) Vs. String.split('') (version: 0)

Comparing performance of: split vs Array.from

Created: one year ago by: Registered User

Jump to the latest result

split

Array.from

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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