Benchmark: Push x spread - MeasureThat.net

Tests:

Spread
const arr = [1, 2]; const newArr = [...arr, 3];
Push
const arr = [1, 2]; arr.push(3);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread
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/126.0.0.0 Safari/537.36

Browser/OS: Chrome 126 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Spread	26375142.0 Ops/sec
Push	40051772.0 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.

**Benchmark Definition**

The provided JSON defines two simple JavaScript microbenchmarks:

1. **Push x**: This benchmark tests the performance of pushing an element onto an array using the `push()` method.
2. **Spread**: This benchmark tests the performance of spreading a value into an array using the spread operator (`...`).

**Options Compared**

The "Push" and "Spread" benchmarks compare two different approaches to achieve the same result:

1. Using the `push()` method:
```javascript
arr.push(3);
```
2. Using the spread operator (`...`):
```javascript
const newArr = [...arr, 3];
```

**Pros and Cons of Each Approach**

**Push() Method:**

Pros:

* More explicit and readable code
* Can be more efficient if the array is large and you don't need to access the newly added element

Cons:

* May incur additional overhead due to function calls and array resizing
* Less concise than the spread operator approach

**Spread Operator (`...`):**

Pros:

* More concise and expressive code
* Can be more efficient for smaller arrays or when readability is important

Cons:

* May incur additional overhead due to creating a new array copy
* Less intuitive for beginners

**Library Usage**

None of the provided benchmarks use any external libraries.

**Special JS Features/Syntax**

The spread operator (`...`) was introduced in ECMAScript 2015 (ES6) as part of the JavaScript language specification. It allows you to expand an iterable into individual elements, which can then be used or processed further.

**Other Alternatives**

For the "Push" method, other alternatives could include:

* Using `arr.length++` to increment the array's length
* Using a loop to add elements to the array

For the spread operator (`...`), other alternatives could include using other array methods like `concat()` or implementing a custom concatenation function.

**Benchmark Preparation Code**

The provided JSON does not specify any preparation code, which means that the benchmarks are likely designed to be simple and straightforward. The preparation code is usually used to initialize variables, create arrays, or perform other setup tasks before running the benchmark. In this case, it seems that the tests start with a pre-defined array `[1, 2]` and then either push an element onto it or spread another value into it.

**Device and Browser Considerations**

The provided benchmark results are from Chrome 126 on a desktop device with Mac OS X 10.15.7. The results may vary depending on the browser, operating system, and device used for testing.

Related benchmarks:

Push x spread (version: 0)

Comparing performance of: Spread vs Push

Created: one year ago by: Guest

Jump to the latest result

Spread

Push

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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