Benchmark: Array.prototype.concat vs spread operator vs push vs spread 2

Tests:

Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Push
var params = [ "hello", true, 7 ]; params.push(1); params.push(2);
spread operator 2
var params = [ "hello", true, 7 ]; params.push(...[1, 2]);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat
spread operator
Push
spread operator 2

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark compares the performance of three different approaches to concatenate arrays in JavaScript:

1. `Array.prototype.concat()`
2. The new ES6 spread operator (`...`)
3. The `push()` method with an array as an argument

**Options Compared**

* `Array.prototype.concat()`: This method concatenates two or more arrays and returns a new array.
* Spread operator (`...`): This operator allows you to expand an array into its elements, which can be used to concatenate other arrays.
* `push()` method with an array as an argument: This method adds one or more elements to the end of an array.

**Pros and Cons**

* **Array.prototype.concat()**:
	+ Pros: Well-established method, easy to use, and supported by all browsers.
	+ Cons: Creates a new array, which can be memory-intensive for large arrays.
* **Spread operator (`...`)**:
	+ Pros: Fast, efficient, and modern approach that's gaining popularity.
	+ Cons: Requires JavaScript version 7 or higher, may not work in older browsers.
* `push()` method with an array as an argument**:
	+ Pros: Fast and efficient, as it only adds elements to the existing array.
	+ Cons: May be less intuitive than other methods, and requires understanding of array manipulation.

**Library/Functionality Used**

The benchmark uses the `concat()` method, which is a built-in JavaScript function. It also uses the spread operator (`...`), which is a modern feature introduced in ECMAScript 2015 (ES6). The `push()` method with an array as an argument relies on understanding of array manipulation and is not a specific library or function.

**Special JS Feature/Syntax**

The benchmark uses the ES6 spread operator (`...`) to concatenate arrays. This syntax allows you to expand an array into its elements, which can be used to merge other arrays.

**Other Alternatives**

If the test didn't use `Array.prototype.concat()`, alternative methods for concatenating arrays could include:

* `Array.prototype.push()` with multiple arguments
* `slice()` method followed by `push()` or `concat()`
* Using a library like Lodash's `merge()` function

Note that these alternatives may have different performance characteristics and may not be as efficient as the spread operator.

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36

Browser/OS: Chrome 69 on Mac OS X 10.13.5

View result in a separate tab

Test name	Executions per second
Array.prototype.concat	4080833.8 Ops/sec
spread operator	11392099.0 Ops/sec
Push	15716762.0 Ops/sec
spread operator 2	12557447.0 Ops/sec

Related benchmarks:

Array.prototype.concat vs spread operator vs push vs spread 2 (version: 0)

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: Array.prototype.concat vs spread operator vs Push vs spread operator 2

Created: 6 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

Push

spread operator 2

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):