Benchmark: Array split vs Array split limit vs string substring

Script Preparation code:

var s1 = "foo.bar";
var s2 = "foo.bar.bla.boo.foo.bar";

Tests:

Array.split limit
var n1 = s1.split(".", 1)[0]; var n2 = s2.split(".", 1)[0];
Substring
var n1 = s1.substring(0, s1.indexOf(".")); var n2 = s2.substring(0, s2.indexOf("."));
Array.split
var n1 = s1.split(".")[0]; var n2 = s2.split(".")[0];

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.split limit
Substring
Array.split

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 llama3.1:latest, generated one year ago):

LLMs can make mistakes. Check important info.

Let's dive into the details of this benchmark.

**What is being tested?**

The test case compares three different approaches to extract a substring from a given string:

1. Using `substring()` method with explicit indices (`s1.substring(0, s1.indexOf("."))`)
2. Using `Array.split()` method with limit 1 and indexing (`s1.split(".", 1)[0]`)
3. Using `Array.split()` method without limit and indexing (`s1.split(".")[0]`)

**Options being compared**

The three test cases compare the performance of these three approaches:

* **Substring (Test Name: "Substring")**: This approach uses the `substring()` method to extract a substring from `s1` and `s2`.
* **Array.split limit (Test Name: "Array.split limit")**: This approach uses the `split()` method with a limit of 1 to split `s1` and `s2` at the first occurrence of the dot (`.`) character, and then takes the first element of the resulting array.
* **Array.split (Test Name: "Array.split")**: This approach uses the `split()` method without a limit to split `s1` and `s2` at each occurrence of the dot (`.`) character, and then takes the first element of the resulting array.

**Pros and cons**

Here are some pros and cons of each approach:

* **Substring (Test Name: "Substring")**: This approach is simple and easy to understand. However, it requires calculating the index of the dot (`.`) character manually.
	+ Pros:
		- Easy to implement
		- Good performance for small strings
	+ Cons:
		- Requires manual calculation of indices
* **Array.split limit (Test Name: "Array.split limit")**: This approach uses the `split()` method with a limit, which can be faster than using `substring()`.
	+ Pros:
		- Faster than substring() for large strings
		- Easy to implement
	+ Cons:
		- May not work correctly if the input string has multiple occurrences of the split character (`.`) and no limit is provided
* **Array.split (Test Name: "Array.split")**: This approach uses the `split()` method without a limit, which can be slower than using `substring()`.
	+ Pros:
		- Simple to implement
		- Can handle multiple occurrences of the split character (`.`)
	+ Cons:
		- May be slower for large strings

**Other considerations**

When choosing between these approaches, consider the following factors:

* **Performance**: If performance is critical, using `split()` with a limit (Test Name: "Array.split limit") may be the best choice.
* **Code simplicity**: If code simplicity and readability are more important than performance, using `substring()` or `split()` without a limit may be a better option.
* **Input string characteristics**: If the input strings have multiple occurrences of the split character (`.`), using `Array.split()` (Test Name: "Array.split") may be a better choice.

**Special JS feature or syntax**

In this test case, there are no special JavaScript features or syntax used. The code simply uses standard JavaScript methods and operators to perform the benchmarking tests.

Related benchmarks:

Array split vs Array split limit vs string substring (version: 0)

Comparing performance of: Array.split limit vs Substring vs Array.split

Created: 6 years ago by: Guest

Jump to the latest result

Array.split limit

Substring

Array.split

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model llama3.1:latest, generated one year ago):