Benchmark: filtering objects

Tests:

splice
function extractedObj(array){ var splicedObj = []; for(var i = array.length-1; i >= 0; i--){ if (typeof array[i] === "object" && array[i] !== null){ splicedObj.push(array[i]); array.splice(i, 1); } } return splicedObj; };
filter
function filtObj(element) { return element && typeof element === "object"; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
splice
filter

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark definition is a JavaScript function that extracts objects from an array by iterating over it in reverse order and checking if each element is an object using `typeof`. The goal of this benchmark is to measure how fast two different approaches can extract objects from an array:

1. **splice**: This approach uses the `splice()` method to remove elements from the array while iterating over it.
2. **filter**: This approach uses the `filter()` method to create a new array with only the desired elements.

**Options Compared**

The benchmark compares the performance of these two approaches on an empty and non-empty array. The options being compared are:

* `splice`: Uses `splice()` to remove elements from the array while iterating over it.
	+ Pros: Simple and efficient for small arrays.
	+ Cons: Can be slow for large arrays due to the overhead of the `splice()` method.
* `filter`: Uses `filter()` to create a new array with only the desired elements.
	+ Pros: More memory-efficient than `splice` and can handle larger arrays efficiently.
	+ Cons: Requires creating a new array, which can be slower for very large arrays.

**Library Used**

In this benchmark, neither of the two functions uses any external libraries. However, it's worth noting that if you were to use these functions in a real-world application, you might need to include libraries like Lodash (for `filter()`) or Array.prototype methods.

**Special JS Feature/Syntax**

There is no special JavaScript feature or syntax being used in this benchmark. The code is written in standard JavaScript and uses common features like loops, conditional statements, and array methods.

**Other Alternatives**

If you're looking for alternative approaches to extract objects from an array, here are a few options:

1. **forEach**: You can use `forEach()` to iterate over the array and check if each element is an object.
2. **reduce()**: You can use `reduce()` to accumulate objects in an array while iterating over it.
3. **Array.prototype.slice()`: You can use `slice()` to create a new array with only the desired elements.

Here's some sample code for these alternatives:
```javascript
// forEach
function extractedObjForEach(array) {
  const result = [];
  array.forEach((element) => {
    if (typeof element === 'object' && element !== null) {
      result.push(element);
    }
  });
  return result;
}

// reduce()
function extractedObjReduce(array) {
  const result = [];
  array.reduce((acc, element) => {
    if (typeof element === 'object' && element !== null) {
      acc.push(element);
    }
    return acc;
  }, []);
  return result;
}

// slice()
function extractedObjSlice(array) {
  return array.filter((element) => typeof element === 'object' && element !== null);
}
```
Keep in mind that these alternatives may have different performance characteristics and use cases compared to the `splice()` and `filter()` methods used in this benchmark.

Latest run results:

Run details: (Test run date: 8 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.59 Safari/537.36

Browser/OS: Chrome 54 on Mac OS X 10.11.4

View result in a separate tab

Test name	Executions per second
splice	69306200.0 Ops/sec
filter	69003336.0 Ops/sec

Related benchmarks:

filtering objects (version: 0)

Comparing performance of: splice vs filter

Created: 8 years ago by: Guest

Jump to the latest result

splice

filter

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):