Benchmark: Some, Filter, indexOf

Script Preparation code:

var array = [];

for (var i = 0; i < 10000; i++) {
  array.push(i);
}

Tests:

Array.some
var tempResult = array.some(v => v === 0);
Array.filter
var tempResult = array.filter(v => v === 0);
Array.indexOf
var tempResult = array.indexOf(0) > -1;

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.some
Array.filter
Array.indexOf

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36

Browser/OS: Chrome 100 on Windows

View result in a separate tab

Test name	Executions per second
Array.some	14150285.0 Ops/sec
Array.filter	35644.5 Ops/sec
Array.indexOf	14345001.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and discussed.

**Benchmark Overview**

The benchmark is designed to measure the performance of three JavaScript methods: `some()`, `filter()`, and `indexOf()`. These methods are commonly used for array operations in modern web development. The benchmark uses a large array of 10,000 elements, which is initialized with values from 0 to 9.

**Script Preparation Code**

The script preparation code creates an empty array and populates it with values using a `for` loop:
```javascript
var array = [];
for (var i = 0; i < 10000; i++) {
  array.push(i);
}
```
This ensures that the array is populated with data before running the test cases.

**Html Preparation Code**

There is no HTML preparation code provided, which means that this benchmark does not account for any HTML-related overhead or optimizations.

**Test Cases**

There are three individual test cases:

1. `Array.some()`: This method returns `true` if at least one element in the array passes the test.
```javascript
var tempResult = array.some(v => v === 0);
```
2. `Array.filter()`: This method creates a new array with all elements that pass the test.
```javascript
var tempResult = array.filter(v => v === 0);
```
3. `Array.indexOf()`: This method returns the index of the first element in the array that matches the specified value. If no match is found, it returns -1.
```javascript
var tempResult = array.indexOf(0) > -1;
```

**Library Used**

There are no libraries explicitly mentioned in the benchmark definition or test cases.

**Special JS Features/Syntax**

None of the test cases use any special JavaScript features or syntax beyond the standard methods and data types.

**Comparison Options**

The benchmark is comparing three different approaches to filter out elements from an array:

1. `Array.some()`: A method that checks if at least one element passes a condition.
2. `Array.filter()`: A method that creates a new array with all elements that pass a condition.
3. `Array.indexOf()`: A method that returns the index of the first element that matches a value.

**Pros and Cons**

Here are some pros and cons for each approach:

1. `Array.some()`:
	* Pros: Simple, straightforward, and widely supported.
	* Cons: May return early if only one element passes the condition, which can affect performance.
2. `Array.filter()`:
	* Pros: Creates a new array with all matching elements, making it suitable for use in loops or as a predicate function.
	* Cons: Can be slower than `Array.indexOf()` due to the overhead of creating a new array.
3. `Array.indexOf()`:
	* Pros: Returns the index of the first match, which can be useful for iterating over arrays.
	* Cons: Returns -1 if no match is found, which may not be desirable in some cases.

**Other Considerations**

When choosing between these approaches, consider the specific use case and performance requirements. If you need to filter out multiple conditions or create a new array with matching elements, `Array.filter()` might be the best choice. However, if you only need to check for a single value and want a simple, lightweight approach, `Array.some()` could be sufficient.

**Alternatives**

If you're looking for alternative methods or libraries, consider:

1. Lodash: A popular utility library that includes functions like `filter()`, `some()`, and `indexOf()`.
2. Array.prototype.every(): Similar to `Array.some()`, but returns `false` if no elements pass the condition.
3. Array.prototype.includes(): Returns a boolean indicating whether an element is present in the array, similar to `Array.indexOf()`.

Keep in mind that these alternatives might have different performance characteristics or use cases, so be sure to evaluate them based on your specific requirements.

Related benchmarks:

Some, Filter, indexOf (version: 0)

Comparing performance of: Array.some vs Array.filter vs Array.indexOf

Created: 3 years ago by: Guest

Jump to the latest result

Array.some

Array.filter

Array.indexOf

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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