Benchmark: Javascript: Spread vs push

Tests:

Push
original_array = [1,2,3,4,5] original_array.push(6)
Spread
let original_array = [1,2,3,4,5] original_array = [...original_array, 6]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Push
Spread

Fastest: N/A

Slowest: N/A

Autogenerated LLM Sumamry (model llama3.2:3b, generated 2 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 is designed to compare two approaches for adding an element to an array in JavaScript: using the `push()` method versus the spread operator (`...`).

**Test Cases**

There are two individual test cases:

1. **Push**: This test case uses the traditional way of pushing a new element onto an array using the `push()` method.
2. **Spread**: This test case uses the spread operator to create a new array with the original elements followed by the new element.

**What's being tested?**

The benchmark is measuring the performance difference between these two approaches:

* How efficient is it to add an element to an array using `push()`.
* How efficient is it to add an element to an array using the spread operator (`...`).

**Pros and Cons of each approach:**

1. **Push**:
	* Pros:
		+ Wide support across browsers and platforms.
		+ Easy to read and understand.
	* Cons:
		+ May involve copying the entire array, which can be memory-intensive for large arrays.
2. **Spread**:
	* Pros:
		+ More concise and expressive syntax.
		+ Can be faster for small arrays, as it only creates a new reference to the original array without copying its elements.
	* Cons:
		+ May not work correctly in older browsers or platforms that don't support spread operators.

**Library usage**

There is no explicit library mentioned in this benchmark. However, the `push()` method is a built-in JavaScript function, and the spread operator (`...`) was introduced in ECMAScript 2015 (ES6).

**Special JS feature/syntax**

The spread operator (`...`) is a new syntax introduced in ES6. It allows you to create a new array with the elements of an existing array by spreading it out into a new array.

**Other alternatives**

If you need to add an element to an array, there are other approaches available:

1. **Array.prototype.concat()**: This method creates a new array with the elements of the original array followed by the new element.
2. **Array.prototype.splice()**: This method modifies the original array by adding a new element at the specified index.

However, these alternatives may not be as efficient or concise as using `push()` or the spread operator.

I hope this explanation helps!

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/102.0.0.0 Safari/537.36

Browser/OS: Chrome 102 on Linux

View result in a separate tab

Test name	Executions per second
Push	3726590.0 Ops/sec
Spread	39069540.0 Ops/sec

Related benchmarks:

Javascript: Spread vs push (version: 0)

Adding to an array using spread vs push

Comparing performance of: Push vs Spread

Created: 2 years ago by: Guest

Jump to the latest result

Push

Spread

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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