Benchmark: Array.prototype.concat vs spread operator vs push1312323123123

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);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):

LLMs can make mistakes. Check important info.

I'll break down the provided benchmark and explain what's being tested, the options being compared, their pros and cons, and other considerations.

**Benchmark Overview**

The benchmark is designed to compare the performance of three different methods for concatenating arrays:

1. `Array.prototype.concat()`
2. The spread operator (`...`)
3. The `push()` method

The test cases use a simple array with three elements: a string, a boolean, and an integer.

**Options being compared**

Here's a brief overview of each option being compared:

* **Array.prototype.concat()**: This is the traditional way to concatenate arrays in JavaScript. It creates a new array by copying the elements from both arrays.
	+ Pros:
		- Wide support across browsers
		- Easy to read and understand for developers familiar with the method
	+ Cons:
		- Creates a new array, which can lead to unnecessary memory allocation
* **Spread operator (`...`)**: This is a newer feature in JavaScript that allows you to spread an array's elements into a new array.
	+ Pros:
		- More concise and readable than `concat()`
		- Creates a shallow copy of the original array, which can be faster for large arrays
	+ Cons:
		- Less widely supported across browsers (although Firefox 66 supports it)
* **Push()**: This method modifies the existing array by appending new elements to its end.
	+ Pros:
		- Fast and efficient, as it only modifies the original array
	+ Cons:
		- Less readable than `concat()` or the spread operator

**Library usage**

There is no explicit library mentioned in the benchmark definition. However, the test cases use JavaScript's built-in functions: `Array.prototype.concat()` and `...`. The `push()` method is also a built-in JavaScript function.

**Special JS feature/syntax**

The spread operator (`...`) is a newer feature introduced in ECMAScript 2015 (ES6). It allows you to spread an array's elements into a new array, making it more concise and readable than traditional methods like `concat()`.

**Other considerations**

When deciding which method to use for concatenating arrays, consider the following factors:

* Performance: If speed is critical, using `push()` might be faster, as it only modifies the original array. However, this comes at the cost of readability.
* Readability: The spread operator (`...`) and `concat()` are generally more readable than `push()`, especially for developers familiar with these methods.
* Browser support: If you need to support older browsers, you might want to use `concat()` instead of the spread operator.

**Alternatives**

If you're interested in exploring other alternatives, here are a few:

* `Array.prototype.slice()`: This method creates a shallow copy of an array and can be used as an alternative to `concat()`.
* `Array.prototype.splice()`: This method modifies the original array by inserting or removing elements at a specific index.
* Using `reduce()` or other iterative methods to concatenate arrays.

Keep in mind that these alternatives might have different performance characteristics, readability, and browser support compared to the options being compared in this benchmark.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:66.0) Gecko/20100101 Firefox/66.0

Browser/OS: Firefox 66 on Linux

View result in a separate tab

Test name	Executions per second
Array.prototype.concat	3440069.2 Ops/sec
spread operator	2931079.2 Ops/sec
Push	13826240.0 Ops/sec

Related benchmarks:

Array.prototype.concat vs spread operator vs push1312323123123 (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

Created: 5 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

Push

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):