Benchmark: indexOf vs test - MeasureThat.net

Script Preparation code:

var test1 = 'test|tester|testing|tester|testing|test|tester|testing|tester|testing'

Tests:

split
var result1 = (test1.split(','));
indexOf
var result1 = (test1.indexOf('test') !== -1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
split
indexOf

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into explaining the benchmark and its various components.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmark hosted on MeasureThat.net. The benchmark is designed to compare the performance of two different methods: `indexOf` and `split`. These methods are used to search for a specific value within a string.

**Test Cases**

There are two individual test cases:

1. **`split`**: This test case uses the `split()` method to split the provided string `test1` into an array of substrings.
2. **`indexOf`**: This test case uses the `indexOf()` method to check if a specific value ('test') exists within the string `test1`.

**Options Compared**

The benchmark compares two options:

* **`split()`**: This method splits the string into an array of substrings based on a specified separator (in this case, a comma).
* **`indexOf()`**: This method returns the index of the first occurrence of a specific value within the string.

**Pros and Cons of Each Approach**

1. **`split()`**:
	* Pros:
		+ Can handle multiple separators.
		+ Efficient for large datasets.
	* Cons:
		+ May not be suitable for cases where the separator is a single character.
		+ Creates an array of substrings, which can consume more memory.
2. **`indexOf()`**:
	* Pros:
		+ Simple and easy to use.
		+ Suitable for most use cases.
	* Cons:
		+ May be slower for large datasets due to the search algorithm.
		+ Returns -1 if the value is not found, which can lead to errors in some applications.

**Library**

There is no explicit library mentioned in the provided JSON. However, it's worth noting that both `split()` and `indexOf()` are built-in methods of JavaScript strings.

**Special JS Features/Syntax**

The benchmark uses a feature called "raw UA string" (User Agent string), which provides information about the browser and device being used to run the test. This allows MeasureThat.net to provide more accurate results by taking into account the performance characteristics of different browsers and devices.

**Other Alternatives**

If you're looking for alternatives to these methods, consider the following:

* **`includes()`**: A newer method introduced in ECMAScript 2019 (ES10) that checks if a string includes a specific value. It's generally faster and more efficient than `indexOf()`.
* **`match()`**: A method that returns an array of matches for a regular expression against a string.
* **`Array.prototype.some()`** or **`Array.prototype.every()`**: Methods that allow you to iterate over an array and check if any or all elements match a condition.

Keep in mind that the choice of method depends on your specific use case and performance requirements.

Latest run results:

Run details: (Test run date: 8 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/122.0.0.0 Safari/537.36

Browser/OS: Chrome 122 on Windows

View result in a separate tab

Test name	Executions per second
split	5509907.0 Ops/sec
indexOf	9145909.0 Ops/sec

Related benchmarks:

indexOf vs test (version: 0)

Comparing performance of: split vs indexOf

Created: 8 months ago by: Guest

Jump to the latest result

split

indexOf

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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