Benchmark: test index of not found 2

Script Preparation code:

var string = 'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.'

Tests:

substring iindex odf
string.substring(0,55).indexOf('consectetur')
substring includes
string.substring(0,55).includes('consectetur')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
substring iindex odf
substring includes

Fastest: N/A

Slowest: N/A

Latest run results:

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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.

**Overview**

The test case is designed to measure the performance of two different approaches for searching a specific substring within a string in JavaScript. The input string is predefined and remains constant across all tests, while the search method changes between two approaches: `indexOf()` and `includes()`. The benchmark aims to determine which approach is faster.

**Options being compared**

There are two options being compared:

1. **`indexOf()`**: This method returns the index of the first occurrence of a substring within another string. If the substring is not found, it returns -1.
2. **`includes()`**: This method returns a boolean value indicating whether a string contains a specified value (the "search term") at least once.

**Pros and Cons**

**`indexOf()`**:

* Pros:
	+ Can be faster for large strings since it only searches up to the first occurrence of the substring.
	+ Can provide more precise results, as it returns an index rather than just a boolean value.
* Cons:
	+ May return -1 if the substring is not found, which can lead to additional checks or handling.
	+ Can be slower for small strings or when searching multiple times.

**`includes()`**:

* Pros:
	+ Returns a simple boolean value (true/false), making it easier to handle results.
	+ Does not require index calculation, as it simply checks if the substring is present anywhere in the string.
* Cons:
	+ May be slower for large strings since it searches the entire string, even if only looking for one occurrence.
	+ Can lead to more CPU cycles due to the boolean evaluation.

**Other considerations**

Both methods have trade-offs in terms of performance and handling results. `indexOf()` is generally faster for larger strings but may return -1 if not found, requiring additional checks. `includes()` provides a simple boolean result but might be slower overall.

**Library and special JS feature usage**

There are no libraries mentioned in the benchmark definition or individual test cases. However, there is an example of a JavaScript variable named "string" used throughout the script preparation code. This variable represents the input string that will be searched by both methods.

**Special JS features**

None are explicitly mentioned or required for this benchmark to run.

Now, let's look at other alternatives for similar benchmarks:

* For searching substrings in a more general sense (not just strings):
	+ Regular expressions
	+ `match()` method
	+ String.prototype.matchAll()
* For comparing performance of different search methods on specific string types (e.g., regex patterns):
	+ Use the Benchmark.js library, which provides an API for benchmarking JavaScript code and can be used to compare performance of different regular expression engines or other string processing algorithms.
	+ Consider using a more specialized library like regex- benchmark or regex-performance-tests.

These alternatives might offer additional insights into specific use cases or optimization opportunities.

Related benchmarks:

test index of not found 2 (version: 0)

Comparing performance of: substring iindex odf vs substring includes

Created: 2 years ago by: Guest

Jump to the latest result

substring iindex odf

substring includes

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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