Benchmark: Append array to array: destructuring push vs for-each push

Tests:

Destructuring push
const emptyArray = []; const newArray = [1, 2, 3]; emptyArray.push(...newArray);
For-each push
const emptyArray = []; const newArray = [1, 2, 3]; newArray.forEach(el => emptyArray.push(el));

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Destructuring push
For-each push

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/128.0.0.0 Safari/537.36

Browser/OS: Chrome 128 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Destructuring push	74614608.0 Ops/sec
For-each push	76091352.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

MeasureThat.net is a website where users can create and run JavaScript microbenchmarks to compare performance of different approaches. The current benchmark compares two ways of appending an array to another array in JavaScript: destructuring push versus for-each push.

**Options Compared**

There are two options being compared:

1. **Destructuring Push**: This approach uses the spread operator (`...`) to append elements from one array to another.
```javascript
const emptyArray = [];
const newArray = [1, 2, 3];
emptyArray.push(...newArray);
```
2. **For-each Push**: This approach uses the `forEach` method to iterate over each element in an array and push it to another array.
```javascript
const emptyArray = [];
const newArray = [1, 2, 3];
newArray.forEach(el => emptyArray.push(el));
```

**Pros and Cons**

* **Destructuring Push**: This approach is generally faster because it avoids the overhead of function calls and loop iterations. However, it requires JavaScript 2015 or later to support the spread operator.
	+ Pros: Faster execution time
	+ Cons: Requires modern JavaScript features (JavaScript 2015 or later)
* **For-each Push**: This approach is simpler to implement and doesn't require any special libraries or syntax. However, it can be slower due to the overhead of function calls and loop iterations.
	+ Pros: Simpler implementation
	+ Cons: Slower execution time

**Library Usage**

There is no explicit library usage in this benchmark.

**Special JS Features/Syntax**

* The `...` spread operator is a special JavaScript feature introduced in 2015, which allows for more concise array literals and function calls.
* The `forEach` method is a built-in JavaScript method that iterates over each element in an array.

**Other Alternatives**

If the benchmark didn't use destructuring push or for-each push, alternative approaches might include:

1. Using `Array.prototype.concat()`
2. Using `Array.prototype.reduce()` to append elements to an array
3. Using a traditional loop with indexing and assignment

These alternatives would likely result in slower execution times compared to the optimized destructuring push and for-each push approaches.

Overall, this benchmark provides a simple and concise way to compare the performance of two common JavaScript techniques: destructuring push and for-each push.

Related benchmarks:

Append array to array: destructuring push vs for-each push (version: 0)

Comparing performance of: Destructuring push vs For-each push

Created: one year ago by: Guest

Jump to the latest result

Destructuring push

For-each push

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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