Benchmark: IndexOf vs Includes array of numbers

Script Preparation code:

var array = [1, 2, 3, 100500, 666]

Tests:

IndexOf
array.indexOf(666) !== 1
Includes
array.includes(666)

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

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**Benchmark Definition and Script Preparation Code**

The benchmark definition represents two test cases: `IndexOf` and `Includes`. The script preparation code provides an array of numbers, which is used as input for both tests. The code is simple and straightforward, making it easy to understand.

```javascript
var array = [1, 2, 3, 100500, 666];
```

**Test Cases: IndexOf vs Includes**

The two test cases compare the performance of two JavaScript methods:

1. `indexOf()`: This method returns the index of the specified value in the array. If the value is not found, it returns `-1`.
2. `includes()`: This method returns a boolean indicating whether the specified value is present in the array.

**Comparison and Pros/Cons**

Both methods have their strengths and weaknesses:

* `indexOf()` is generally faster because it only needs to traverse the array until it finds the target value or reaches the end of the array.
	+ Pros: Fast, simple implementation.
	+ Cons: Returns `-1` when not found, which might be unnecessary for some use cases.
* `includes()` is more intuitive and often preferred due to its concise syntax.
	+ Pros: Easier to read and write, returns a boolean value indicating presence or absence.
	+ Cons: Might be slower than `indexOf()` due to the additional overhead of returning a boolean.

**Library Usage**

There is no explicit library mentioned in the benchmark definition. However, it's worth noting that both `indexOf` and `includes` are built-in methods in JavaScript, so no external libraries are required.

**Special JS Feature or Syntax**

There is no special JavaScript feature or syntax explicitly used in this benchmark. The code is straightforward and uses standard JavaScript constructs.

**Other Alternatives**

If you need to optimize array searches, consider the following alternatives:

* `findIndex()`: Similar to `indexOf`, but returns the index of the first matching element instead of just checking for presence.
* Custom implementations using loops or regular expressions can also be optimized for specific use cases.

For more advanced optimizations or comparisons, MeasureThat.net provides a wide range of benchmarking options and scripts. You can explore these further to find the best approach for your specific needs.

Related benchmarks:

IndexOf vs Includes array of numbers (version: 0)

Comparing performance of: IndexOf vs Includes

Created: 5 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):