Benchmark: Teste array concat

Script Preparation code:

var num1 = [1, 2, 3];
var num2 = [4, 5, 6];
var num3 = [7, 8, 9];

Tests:

Push
Array.prototype.push.apply(num1, num2); Array.prototype.push.apply(num1, num3);
Concat
num1 = num1.concat(num2,num3);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Push
Concat

Fastest: N/A

Slowest: N/A

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/51.0.2704.103 Safari/537.36

Browser/OS: Chrome 51 on Mac OS X 10.11.4

View result in a separate tab

Test name	Executions per second
Push	673837.9 Ops/sec
Concat	4.1 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided JSON and explain what's being tested, compared, and the pros/cons of different approaches.

**Benchmark Definition**

The benchmark definition provides two scripts to test the performance of array concatenation and push methods:

1. `Array.prototype.push.apply(num1, num2);` and `Array.prototype.push.apply(num1, num3);`
	* This script uses the `push.apply()` method to add elements from two arrays (`num2` and `num3`) to an existing array (`num1`). The `apply()` method is used to call a function with an array as its this value.
	* This approach can be more efficient than using the dot notation (`num1.push(num2[0], num2[1], num2[2]);` and similarly for `num3`) because it avoids creating temporary arrays.
2. `num1 = num1.concat(num2, num3);`
	* This script uses the built-in `concat()` method to concatenate two arrays (`num2` and `num3`) with an existing array (`num1`). The `concat()` method returns a new array with all elements from the original arrays.
	* This approach can be slower than using `push.apply()` because it creates a temporary array.

**Comparison of Approaches**

The pros and cons of these approaches are:

Pros of `push.apply()`:

* Can be more efficient by avoiding temporary array creation
* Does not require creating an intermediate array

Cons of `push.apply()`:

* May be less readable than using dot notation
* Requires using a function with `apply()` to call the method

Pros of `concat()`:

* More readable and straightforward
* Does not require using `apply()`

Cons of `concat()`:

* Creates temporary arrays, which can be slower and more memory-intensive

**Library Usage**

There is no explicit library usage in this benchmark definition.

**Special JS Feature/Syntax**

None mentioned.

**Other Alternatives**

If you wanted to test performance differences between these approaches using a different method, here are some alternatives:

1. Use a loop to concatenate multiple arrays: Instead of concatenating two arrays at a time, you could use a loop to concatenate multiple arrays together.
2. Use `push.apply()` with a loop: You could also use a loop to push elements from an array into another array using `push.apply()`.
3. Use a custom implementation for concatenation: You could implement your own custom method for concatenating arrays and test its performance compared to the built-in methods.

Here's some sample code for each alternative:

1. Loop-based concatenation:
```javascript
for (var i = 0; i < num2.length; i++) {
  num1.push(num2[i]);
}
for (var i = 0; i < num3.length; i++) {
  num1.push(num3[i]);
}
```
2. `push.apply()` with a loop:
```javascript
while (num2.length > 0) {
  push(num1, num2.shift());
}
while (num3.length > 0) {
  push(num1, num3.shift());
}
```
3. Custom concatenation implementation:
```javascript
function concatArrays(arr1, arr2) {
  var result = [];
  for (var i = 0; i < arr1.length; i++) {
    result.push(arr1[i]);
  }
  for (var i = 0; i < arr2.length; i++) {
    result.push(arr2[i]);
  }
  return result;
}
```
Note that these alternatives may not accurately represent the real-world scenarios where array concatenation is used, but they can help illustrate different approaches to testing performance differences.

Related benchmarks:

Teste array concat (version: 0)

Testando perfoamnce de array concat e push

Comparing performance of: Push vs Concat

Created: 8 years ago by: Guest

Jump to the latest result

Push

Concat

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):