Benchmark: indexOf vs findIndex simple X

Script Preparation code:


var arr = ['one', 'two', 'three'];

var test = 'three';

Tests:

findIndex
arr.findIndex(val => val === test)
indexOf
arr.indexOf(test)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
findIndex
indexOf

Fastest: N/A

Slowest: N/A

Latest run results:

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Autogenerated LLM Summary (model gemma2:9b, generated one year ago):

LLMs can make mistakes. Check important info.

This benchmark tests the performance of two methods for finding the index of an element in an array: `indexOf()` and `findIndex()`.

**Options Compared:**

* **`indexOf(test)`:** This method returns the first index at which a given value (in this case, 'three') can be found within the array. If the value is not found, it returns -1.
* **`findIndex(val => val === test)`:**  This method uses an arrow function to define a search condition. It iterates through the array and returns the index of the first element that satisfies the condition (in this case, an element equal to 'three'). If no element matches the condition, it returns -1.

**Pros/Cons:**

* **`indexOf()`:**
    *  **Pros:** More straightforward syntax, potentially faster due to its simpler implementation. 
    *  **Cons:** Doesn't allow for complex search conditions using functions.
* **`findIndex()`:**
    *  **Pros:** More flexible, allows defining search conditions with functions, enabling more complex searches.
    *  **Cons:** Can be slightly slower due to the added complexity of function execution within the loop.

**Other Considerations:**

* **Array Size:** The performance difference between these methods might become more pronounced with larger arrays. `findIndex()`'s overhead from function calls could be more noticeable.
* **Search Complexity:** For simple searches, `indexOf()` is usually sufficient. If you need to search based on multiple criteria or perform more complex logic, `findIndex()` provides greater flexibility.

**Alternatives:**

* **Libraries like Lodash:**  Lodash offers a similar `find` function with additional features and optimizations.
* **Custom Loop:** You could implement your own loop for searching the array if you need fine-grained control over the process.

Let me know if you have any other questions or want to explore specific aspects in more detail!

Related benchmarks:

indexOf vs findIndex simple X (version: 0)

Comparing performance of: findIndex vs indexOf

Created: 5 years ago by: Guest

Jump to the latest result

findIndex

indexOf

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

Autogenerated LLM Summary (model gemma2:9b, generated one year ago):