Benchmark: array.push array literal

Script Preparation code:

var props = { x: 1, y: 2, onClick: () => {}, onMouseDown: () => {}, onMouseUp: () => {}, visible: false }

Tests:

array.push
const a = [] Object.keys(props).forEach(it => { a.push('x', props[it]) })
object literal
const a = [ 1, 2, () => {}, () => {}, () => {}, false, {}, {a: 1, b: 2} ]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array.push
object literal

Fastest: N/A

Slowest: N/A

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/90.0.4430.93 Safari/537.36

Browser/OS: Chrome 90 on Windows

View result in a separate tab

Test name	Executions per second
array.push	1093583.1 Ops/sec
object literal	1030564608.0 Ops/sec

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

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark definition json provides two test cases:

1. `array.push`: This test case measures the performance of pushing elements to an array using the `push()` method.
2. `object literal`: This test case measures the performance of creating objects directly in the JavaScript syntax, without using the `Object.create()` or other methods.

**Script Preparation Code**

The script preparation code is used to set up the environment for the benchmark:
```javascript
var props = { x: 1, y: 2, onClick: () => {}, onMouseDown: () => {}, onMouseUp: () => {}, visible: false }
```
This code defines an object `props` with several properties, including some functions and a boolean value. This object will be used to create the objects being pushed to the array or directly created in the JavaScript syntax.

**Html Preparation Code**

The html preparation code is empty, which means that no HTML document is being created for this benchmark.

**Options Compared**

In this benchmark, two options are compared:

1. **Pushing elements to an array using `push()`**: This method adds elements to the end of the array.
2. **Creating objects directly in JavaScript syntax**: This approach uses the object literal syntax to create new objects.

**Pros and Cons**

**Pushing elements to an array using `push()`**:

Pros:

* Simple and straightforward
* Fast execution

Cons:

* May incur some overhead due to the creation of a new array object
* Can lead to slower performance if the array is very large

**Creating objects directly in JavaScript syntax**:

Pros:

* Often faster than pushing elements to an array, especially for small arrays
* Can be more efficient since it avoids the overhead of creating a new array object

Cons:

* May require more complex code to create and manipulate objects
* Can lead to slower performance if the object is very large or has many properties

**Library Used**

None are explicitly mentioned in the benchmark definition.

**Special JS Features or Syntax**

The benchmark uses some advanced JavaScript features, including:

* **Arrow functions**: The `onClick`, `onMouseDown`, and `onMouseUp` functions are defined using arrow functions.
* **Object literal syntax**: The objects being created directly in the JavaScript syntax use the object literal syntax (`{ x: 1, y: 2 }`).
* **Spread operator**: Although not explicitly used, the spread operator (`...`) is implied when defining arrays and objects (e.g., `const a = [ 1, 2, () => {}, () => {},  () => {}, false, {}, {a: 1, b: 2} ]`).

**Other Alternatives**

If you're interested in exploring alternative approaches or testing different options, here are some potential alternatives:

* Test using `Object.create()` to create objects directly.
* Test pushing elements to an array using the `unshift()` method instead of `push()`.
* Test creating objects directly in a different language (e.g., C++ or Python) and then compiling it to JavaScript.

Keep in mind that these alternatives may not be relevant to the specific benchmark being tested, but they can provide interesting insights into the performance characteristics of different approaches.

Related benchmarks:

array.push array literal (version: 0)

Comparing performance of: array.push vs object literal

Created: 3 years ago by: Guest

Jump to the latest result

array.push

object literal

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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