Benchmark: Adding to an array with push.apply vs spread vs loop

Tests:

Adding with Function.prototype.apply on the push method
var target_array = []; var new_data = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]; target_array.push.apply(target_array, new_data)
Adding with spread
var target_array = []; var new_data = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]; target_array.push(...new_data)
Adding with loop
var target_array = []; var new_data = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20]; for(let i = 0; i < new_data.length; i++){target_array.push(new_data[i])}

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Adding with Function.prototype.apply on the push method
Adding with spread
Adding with loop

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:126.0) Gecko/20100101 Firefox/126.0

Browser/OS: Firefox 126 on Windows

View result in a separate tab

Test name	Executions per second
Adding with Function.prototype.apply on the push method	9535217.0 Ops/sec
Adding with spread	9371289.0 Ops/sec
Adding with loop	8887086.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark definition and test cases, explaining what's being tested, the pros and cons of each approach, and other considerations.

**Benchmark Definition:**

The benchmark is testing three different ways to add elements to an array:

1. Using `push.apply` with `Function.prototype.apply`
2. Using the spread operator (`...`)
3. Using a traditional `for` loop

**Test Cases:**

Each test case represents one of the above approaches. Let's analyze each one:

### 1. Adding with Function.prototype.apply on the push method

```javascript
var target_array = [];
var new_data = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20];
target_array.push.apply(target_array, new_data);
```

**Pros:**

* This approach is efficient because it avoids creating a new array and uses the `push` method to add elements one by one.
* It's also easy to understand and implement.

**Cons:**

* Performance-wise, this approach can be slower than the other two due to the overhead of `Function.prototype.apply`.
* The use of `apply` might make it harder for some developers to read or maintain the code.

### 2. Adding with spread

```javascript
var target_array = [];
var new_data = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20];
target_array.push(...new_data);
```

**Pros:**

* This approach is concise and easy to read.
* It's also relatively fast because it creates a new array using the spread operator.

**Cons:**

* Some older browsers might not support the spread operator (`...`).
* The use of `push` with spread might make the code less readable for some developers.

### 3. Adding with loop

```javascript
var target_array = [];
var new_data = [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20];
for(let i = 0; i < new_data.length; i++){
    target_array.push(new_data[i]);
}
```

**Pros:**

* This approach is simple and easy to understand.
* It's also relatively fast because it uses a traditional loop.

**Cons:**

* The use of `push` with a loop can be less efficient than the other two approaches due to the overhead of the loop.
* The code might not be as concise or readable as the other two options.

**Library:**

None mentioned in this benchmark definition. However, if you notice any libraries used in the provided test cases (which I didn't see), please let me know and I'll be happy to help.

**Special JS feature/syntax:**

The spread operator (`...`) is a relatively new feature in JavaScript (introduced in ECMAScript 2015). It allows for concise array creation and spreading elements into an existing array or object. If you're using an older browser that doesn't support the spread operator, you'll need to use one of the other approaches.

**Other considerations:**

When choosing between these three approaches, consider the following:

* Performance: If performance is critical, using `push.apply` might be the best option due to its efficiency.
* Code readability: Using the spread operator can make the code more concise and readable. However, if you're working with older browsers that don't support it, use one of the other approaches.
* Browser compatibility: Be aware that some browsers might not support certain features or syntax.

Related benchmarks:

Adding to an array with push.apply vs spread vs loop (version: 0)

Comparing performance of: Adding with Function.prototype.apply on the push method vs Adding with spread vs Adding with loop

Created: 3 years ago by: Guest

Jump to the latest result

Adding with Function.prototype.apply on the push method

Adding with spread

Adding with loop

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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