Benchmark: spread operator vs push test - correct

Tests:

Spread Operator
var other = [ 1, 2, ...[ "hello", true, 7 ] ]
Push
var other = [ 1, 2 ].push("hello", true, 7);

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

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/131.0.0.0 Safari/537.36

Browser/OS: Chrome 131 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Spread Operator	41381448.0 Ops/sec
Push	54031988.0 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, compared, and discussed.

**Benchmark Overview**

The test measures the performance difference between two approaches in JavaScript: using the spread operator (`...`) to concatenate arrays, versus using `push()` with multiple arguments. The goal is to compare which approach is faster for a specific use case.

**Options Compared**

The benchmark compares two options:

1. **Spread Operator**: Using the spread operator (`...`) to create a new array by concatenating another array.
2. **Push() with Multiple Arguments**: Using `push()` method to add multiple elements to an existing array.

**Pros and Cons of Each Approach**

* **Spread Operator**:
	+ Pros: More concise, readable code; can be used for other types of concatenations (e.g., arrays with objects).
	+ Cons: Can lead to confusion if not understood by all developers; might be slower due to the need to create a new array.
* **Push() with Multiple Arguments**:
	+ Pros: More traditional and familiar syntax; no overhead of creating a new array.
	+ Cons: Less concise, less readable code; can lead to multiple function calls, which might be slower.

**Library/Function Used**

There is no explicit library or function being used in this benchmark. The `push()` method is a built-in JavaScript function for adding elements to an array.

**Special JS Feature/Syntax**

The benchmark leverages the new ES6 spread operator feature (`...`) and the `push()` method with multiple arguments, which are both widely supported in modern browsers and Node.js environments.

**Other Alternatives**

If you're interested in exploring alternative approaches or optimizing your code further, here are some additional options to consider:

* Using `concat()` instead of spread operator: `var other = [ 1, 2, ].concat([ "hello", true, 7 ])`
* Using a library like Lodash for array manipulation: `_arr.push.apply(other, ["hello", true, 7])`
* Exploring more efficient data structures or algorithms, such as using an array with `unshift()` instead of `push()`

Keep in mind that these alternatives might change the performance characteristics of your code, and you should test them to determine which one best suits your needs.

I hope this explanation helps!

Related benchmarks:

spread operator vs push test - correct (version: 0)

Compare the new ES6 spread operator with and push Comparing performance of spread operator vs Push

Comparing performance of: Spread Operator vs Push

Created: 6 years ago by: Guest

Jump to the latest result

Spread Operator

Push

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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