Benchmark: IndexOf vs Includes in string tedt

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') !== -1
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

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

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Let's break down the benchmark and explain what's being tested.

**Benchmark Overview**

The benchmark measures the performance difference between two string methods: `indexOf` and `includes`. The test case creates a fixed-length string with a specific phrase ("tempor") embedded within it, and then tests both methods to find this phrase. The goal is to identify which method is faster for finding occurrences of a pattern in a large string.

**Options Compared**

There are two main options being compared:

1. **`indexOf`**: This method searches for the first occurrence of a specified value (in this case, "tempor") within the string. If the value is not found, it returns -1.
2. **`includes`**: This method checks if the string includes the specified value ("tempor"). It returns `true` if the value is found anywhere in the string and `false` otherwise.

**Pros and Cons**

* `indexOf`:
	+ Pros: Generally faster for finding a single occurrence of a specific value. Its implementation is more straightforward, as it only needs to traverse the string until it finds the match or reaches the end.
	+ Cons: May not be suitable for finding multiple occurrences, as it will stop searching after the first match. This can lead to suboptimal results if you need to find all matches.
* `includes`:
	+ Pros: Easier to use and more intuitive than `indexOf`, especially when dealing with edge cases or large strings. It's also more efficient for finding multiple occurrences, as it only needs to traverse the string once.
	+ Cons: May be slower for single-occurrence searches due to its implementation, which involves iterating over the entire string.

**Library and Special JS Feature**

Neither `indexOf` nor `includes` rely on any specific JavaScript libraries. However, both methods are part of the standard ECMAScript specification, which means they're supported by most modern browsers and JavaScript engines.

**Other Considerations**

When using these methods, keep in mind:

* For large strings, `includes` might be a better choice for finding multiple occurrences, as it can avoid unnecessary iterations.
* If you need to find the first occurrence of a value, `indexOf` is likely a better option due to its performance advantages.

**Alternative Approaches**

Other alternatives to consider when searching for patterns in strings include:

1. **Regular Expressions (regex)**: While not part of the standard string methods, regex offers more advanced pattern-matching capabilities and can be faster than `indexOf` or `includes` for certain use cases.
2. **String.prototype.match()**: This method returns an array of all matches found in the string. It's similar to `includes`, but provides more control over the search process.
3. **Custom iterative searching**: In some cases, implementing a custom loop-based search might provide better performance or control over the search process.

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

Related benchmarks:

IndexOf vs Includes in string tedt (version: 0)

Banana

Comparing performance of: IndexOf vs Includes

Created: 5 years ago by: Guest

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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):