Benchmark: IndexOf vs Includes in string 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:

IndexOf
string.indexOf('tempor') >= 0
Includes
string.includes('tempor')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
IndexOf
Includes

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 provided JSON and explain what's being tested in this JavaScript microbenchmark.

**Benchmark Definition**

The benchmark is defined by two test cases:

1. `IndexOf`: Tests if the `indexOf()` method returns a non-negative index for a specific substring within a given string.
2. `Includes`: Tests if the `includes()` method returns `true` when a specific substring exists within a given string.

**Script Preparation Code**

The script preparation code is a JavaScript variable assignment that creates a sample string:
```javascript
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.';
```
This code is executed once before running the benchmark.

**Test Case Options**

There are two test case options:

1. **IndexOf**: Tests if `indexOf()` returns a non-negative index for the substring `'tempor'`.
2. **Includes**: Tests if `includes()` returns `true` when searching for the substring `'tempor'`.

**Pros and Cons of Each Approach**

**IndexOf:**

Pros:

* Can be faster than `includes()` since it only needs to find the first occurrence of the substring.
* May be more efficient in certain situations, such as when working with very large strings.

Cons:

* Requires an exact match for the search string.
* Returns `-1` if the substring is not found.

**Includes:**

Pros:

* More flexible than `indexOf()` since it returns a boolean value indicating whether any part of the string matches the search string.
* Does not require an exact match.

Cons:

* May be slower than `indexOf()` due to the additional overhead of searching for all occurrences.
* Returns `true` if at least one character in the string matches the search string.

**Library and Purpose**

In this benchmark, the `includes()` method uses the JavaScript built-in `String.prototype.includes()` method. This method returns a boolean value indicating whether any part of the string matches the search string.

**Special JS Feature or Syntax**

There are no special features or syntax used in this benchmark that would require specific knowledge to understand.

**Other Alternatives**

For this type of benchmark, alternative approaches could include:

* Using `string.match()` with a regular expression to search for the substring.
* Implementing a custom substring search algorithm using bitwise operations or other low-level techniques.
* Measuring the performance of different JavaScript engines (e.g., V8, SpiderMonkey) using a separate benchmark.

Note that these alternatives are not currently being tested in this benchmark.

Related benchmarks:

IndexOf vs Includes in string 2 (version: 0)

Banana

Comparing performance of: IndexOf vs Includes

Created: 2 years ago by: Guest

Jump to the latest result

IndexOf

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):