Benchmark: sdfdArray split vs string substring

Script Preparation code:

var s1 = "foo.bar.abc";
var s2 = "foo";

Tests:

Array.split
var n1 = s1.split(".").slice(2).join('.'); var n2 = s2.split(".")[0];
Substring
var n1 = s1.substring(0, s1.lastIndexOf(".")); var n2 = s2.substring(0, s2.indexOf("."));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.split
Substring

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_5) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1.1 Safari/605.1.15

Browser/OS: Safari 13 on Mac OS X 10.15.5

View result in a separate tab

Test name	Executions per second
Array.split	1732418.2 Ops/sec
Substring	2250933.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark definition represents a JavaScript microbenchmark that tests two approaches: array `split()` method and string `substring` method for splitting a string at a specific separator (`"."`). The script preparation code defines two variables, `s1` and `s2`, which contain the input strings. `s1` is a fully qualified domain name with multiple separators, while `s2` is a shorter string without any separators.

**Options Compared**

Two approaches are compared:

1. **Array `split()` method**: This approach splits the array into an array of substrings using the `split()` method.
2. **String `substring` method**: This approach uses the `substring` method to extract a subset of characters from the original string.

**Pros and Cons**

* **Array `split()` method**:
	+ Pros: Simple, efficient, and widely supported in modern browsers.
	+ Cons: May not be suitable for very large strings or complex splitting scenarios, as it creates an array of substrings.
* **String `substring` method**:
	+ Pros: Can be more efficient for very large strings or complex splitting scenarios, as it only extracts a subset of characters without creating an intermediate array.
	+ Cons: May not be supported in older browsers or versions of JavaScript (e.g., `substring` is deprecated in ECMAScript 5).

**Library and Purpose**

None of the libraries are explicitly mentioned in this benchmark.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax used in this benchmark. The code only uses standard JavaScript syntax and features.

**Other Alternatives**

If you want to compare other approaches for splitting strings, some alternatives could be:

* Using regular expressions (`RegExp`) with the `match()` method.
* Using the `String.prototype.slice()` method to extract a subset of characters from the original string.
* Using the `Array.prototype.splice()` method to split the array into an array of substrings.

In summary, this benchmark compares two common approaches for splitting strings in JavaScript: using the `split()` method on arrays and using the `substring` method on strings. The choice between these approaches depends on the specific use case and performance requirements.

Related benchmarks:

sdfdArray split vs string substring (version: 0)

Comparing performance of: Array.split vs Substring

Created: 4 years ago by: Registered User

Jump to the latest result

Array.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):