Benchmark: Array push vs map v1

Script Preparation code:

var a1 = []
var a2 = new Array(10).fill(null)

Tests:

array.push
for (let i = 0; i < 10; i++) { a1.push({ itemIndex: i }) }
array.map
a2.map((_, i) => ({ itemIndex: i }))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array.push
array.map

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:133.0) Gecko/20100101 Firefox/133.0

Browser/OS: Firefox 133 on Linux

View result in a separate tab

Test name	Executions per second
array.push	1022315.8 Ops/sec
array.map	8813303.0 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 benchmark and its options.

**Benchmark Overview**

The benchmark is comparing two ways to add elements to an array: using the `push()` method versus the new ES6 spread operator (`...`) in combination with `map()`. The benchmark aims to determine which approach is faster.

**Options Compared**

There are only two options being compared:

1. **`array.push()`**: This is a traditional way of adding elements to an array by calling the `push()` method on each element individually.
2. **`array.map((_, i) => ({ itemIndex: i }))`**: This approach uses the spread operator (`...`) and `map()` to add elements to a new array.

**Pros and Cons**

* **`array.push()`**:
	+ Pros: Simple, straightforward implementation. No additional libraries or complexity required.
	+ Cons: May be slower due to individual push operations for each element.
* **`array.map()`**: 
	+ Pros: Can handle larger arrays efficiently by batch-processing elements using `map()`.
	+ Cons: Requires understanding of the spread operator (`...`) and potentially introduces unnecessary complexity.

**Other Considerations**

The benchmark also includes two pre-benchmark preparation steps:

1. Creating an empty array `a1` using `var a1 = []`.
2. Creating an array `a2` with 10 null elements using `new Array(10).fill(null)`.

These steps are necessary to ensure the benchmark runs consistently and accurately.

**Library Usage**

There is no specific library mentioned in this benchmark, but it uses standard JavaScript features like `map()` and `push()`.

**Special JS Feature/Syntax (None)**

Since there's no special feature or syntax used in this benchmark, we can skip that part of the explanation.

**Other Alternatives**

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

* Using `Array.prototype.slice()` to create a new array with elements added using `push()`.
* Implementing a custom iterator-based approach for adding elements to an array.
* Comparing performance with third-party libraries like Lodash or Ramda.

Keep in mind that each of these alternatives would require additional setup and may introduce different complexity factors compared to the original benchmark.

Related benchmarks:

Array push vs map v1 (version: 0)

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: array.push vs array.map

Created: 6 years ago by: Registered User

Jump to the latest result

array.push

array.map

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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