Benchmark: spread operator... vs push()

Tests:

spread operator
const params = ['hello', 'foobar'] const other = [...params, 'berry']
Push
const params = ['hello', 'foobar'] params.push('berry')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread operator
Push

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

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

**Benchmark Description**

The benchmark compares two approaches: using the new ES6 spread operator (`...`) versus traditional `push()` method to concatenate an array with additional elements.

**Options Compared**

Two options are being compared:

1. **Spread Operator (`...`)**: A syntax introduced in ES6 that allows you to create a new array by spreading an existing array or other iterable into a new array.
2. **Push Method**: A traditional way to add one or more elements to the end of an array.

**Pros and Cons**

Here are some pros and cons of each approach:

* **Spread Operator (`...`)**:
	+ Pros:
		- More concise and expressive syntax
		- Can be used with other iterables, not just arrays
		- Does not modify the original array (it returns a new one)
	+ Cons:
		- Performance overhead due to creating a new array
* **Push Method**:
	+ Pros:
		- More traditional and familiar syntax for many developers
		- Can be more efficient if you're already working with an array and just need to add a few elements
	+ Cons:
		- Less concise and may lead to errors due to typos or misunderstandings of the `push()` method

**Library Usage**

The benchmark uses the JavaScript built-in functions for both approaches, which means it doesn't rely on any external libraries.

**Special JS Features or Syntax**

This benchmark does not use any special features or syntax beyond ES6 spread operator and traditional push() method.

**Other Alternatives**

If you're looking for alternative ways to concatenate arrays in JavaScript, here are a few options:

* Using the `concat()` method: `const result = [...params, 'berry'].concat([/* another array */])`
* Using string interpolation or template literals: `(...'${params.join('')}' + 'berry'`

Keep in mind that these alternatives may have different performance characteristics and might not be as concise as using the spread operator.

Overall, this benchmark helps measure the performance difference between two common approaches to concatenating arrays in JavaScript.

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/87.0.4280.88 Safari/537.36

Browser/OS: Chrome 87 on Windows

View result in a separate tab

Test name	Executions per second
spread operator	33802968.0 Ops/sec
Push	63585132.0 Ops/sec

Related benchmarks:

spread operator... vs push() (version: 0)

Compare the new ES6 spread operator with the traditional push()

Comparing performance of: spread operator vs Push

Created: 3 years ago by: Guest

Jump to the latest result

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 one month ago):