Benchmark: split vs substring (11-11)

Script Preparation code:

var s1 = "https://www.measurethat.net/Benchmarks/Show/2131/0/array-split-vs-string-substring";
var s2 = "foo";

Tests:

split
var n1 = s1.split("/")[0]; var n2 = s2.split("/")[0];
substring
var n1 = s1.substring(0, s1.indexOf("/")); var n2 = s2.substring(0, s2.indexOf("/"));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
substring

Fastest: N/A

Slowest: N/A

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/95.0.4638.69 Safari/537.36

Browser/OS: Chrome 95 on Windows

View result in a separate tab

Test name	Executions per second
split	2598950.8 Ops/sec
substring	3453513.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**What is being tested?**

The provided benchmark tests two approaches to split or extract a certain part from a string: `split` and `substring`. The input strings are defined in the "Script Preparation Code" section:

`s1 = "https://www.measurethat.net/Benchmarks/Show/2131/0/array-split-vs-string-substring"` (a URL)
`s2 = "foo"` (a single-character string)

The benchmark tries to extract the first part of `s1` and `s2`, which is a single character `/` followed by the rest of the string.

**Options compared**

There are two approaches being tested:

1. **`split` method**: This method splits the input string into an array of substrings using a specified separator (in this case, `/`). The first element of the resulting array will contain the desired part.
2. **`substring` method**: This method extracts a specified number of characters from the start of the input string.

**Pros and Cons of each approach**

1. `split` method:
	* Pros:
		+ Can be more efficient for larger strings, as it uses an array-based approach.
		+ Allows for flexible splitting using multiple separators.
	* Cons:
		+ May incur additional overhead due to array creation and manipulation.
		+ Can be slower than `substring` for small strings or when only a single character is extracted.
2. `substring` method:
	* Pros:
		+ Typically faster for small strings, as it involves less overhead.
		+ Only extracts the desired part, without creating an array.
	* Cons:
		+ Limited flexibility, as only specific positions can be extracted (using `indexOf`).
		+ May not be suitable for larger strings or when using multiple separators.

**Library and syntax**

There is no specific library used in this benchmark. The `split` method is a built-in JavaScript method, while the `substring` method is also built-in but requires an explicit call to `indexOf` to extract the desired part.

**Special JS feature or syntax**

No special JavaScript features or syntax are being tested in this benchmark.

**Other alternatives**

If the `split` and `substring` methods were not available, other approaches could be used:

* **Regular expressions**: A regular expression can be used to match and extract specific parts from a string.
* **String manipulation functions**: Depending on the specific requirements, other string manipulation functions (e.g., `indexOf`, `replace`) might be used.

In summary, this benchmark compares two common approaches for extracting parts from strings in JavaScript: `split` and `substring`. The `split` method is more flexible but may incur additional overhead, while the `substring` method is typically faster for small strings but has limited flexibility.

Related benchmarks:

split vs substring (11-11) (version: 0)

Comparing performance of: split vs substring

Created: 3 years ago by: Guest

Jump to the latest result

split

substring

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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