Benchmark: Some vs findIndex 1

Script Preparation code:

var arr = new Array(999).fill(1);
arr.push(0);
var result;

Tests:

some
result = arr.some(el => el === 0);
findIndex
result = arr.findIndex(el => el === 0);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
some
findIndex

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

I'll explain the benchmark in detail.

The provided JSON represents a JavaScript microbenchmark that compares two approaches to find an element in an array: `some()` and `findIndex()`. The benchmark measures the performance difference between these two methods.

**What is tested?**

Two test cases are compared:

1. `some(el => el === 0)`: This uses the `some()` method, which returns a boolean value indicating whether at least one element in the array satisfies the provided condition.
2. `arr.findIndex(el => el === 0)`: This uses the `findIndex()` method, which returns the index of the first element in the array that satisfies the provided condition, or -1 if no such element is found.

**Options compared**

The benchmark compares two options:

* **Manual iteration**: The code manually iterates through the array to find the desired element.
* **Using `some()` and `findIndex()` methods**: The code uses the built-in `some()` and `findIndex()` methods provided by JavaScript, which are optimized for performance.

**Pros and cons of each approach**

1. **Manual iteration**:
	* Pros: None (it's a simple implementation).
	* Cons: It can be slow and inefficient, especially for large arrays.
2. **Using `some()` method**:
	* Pros: Shorter code and easier to read.
	* Cons: It returns a boolean value, which might not be what the developer intends if they need the index of the element.
3. **Using `findIndex()` method**:
	* Pros: Returns the index of the desired element, making it more convenient for many use cases.
	* Cons: Might return -1 if no such element is found, which can be unexpected behavior.

**Library and purpose**

None of the test cases explicitly uses a library. However, `some()` and `findIndex()` are built-in methods provided by JavaScript, so they don't rely on external libraries.

**Special JS feature or syntax**

No special features or syntax are used in this benchmark.

Now, let's consider other alternatives:

1. **Using a loop with an index variable**: This approach would involve using a traditional `for` loop to iterate through the array and keep track of the current index.
2. **Using Array.prototype.forEach()**: Another alternative could be to use `forEach()` method, which is similar to `some()` but returns no value instead.
3. **Using a custom implementation with binary search**: For very large arrays, an optimized approach like binary search could be used.

Keep in mind that these alternatives are not included in the benchmark provided, and their performance would likely vary compared to the original code using `some()` and `findIndex()`.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/118.0

Browser/OS: Firefox 118 on Linux

View result in a separate tab

Test name	Executions per second
some	207143.1 Ops/sec
findIndex	217906.5 Ops/sec

Related benchmarks:

Some vs findIndex 1 (version: 0)

Comparing performance of: some vs findIndex

Created: one year ago by: Guest

Jump to the latest result

some

findIndex

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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