Benchmark: fdgfd ergfdg gergtdg

Script Preparation code:

const ITERATIONS = 500000;
var index = ITERATIONS/2;
var n = Math.random();

var list = [];
for (let i = 0; i < length; i += 1) {
  list.push(Math.random());
}

Tests:

Array clone with spread operator
const clone = [...list];
Array clone with slice
const clone = list.slice();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array clone with spread operator
Array clone with slice

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/100.0.4896.127 Safari/537.36

Browser/OS: Chrome 100 on Windows

View result in a separate tab

Test name	Executions per second
Array clone with spread operator	5088042.5 Ops/sec
Array clone with slice	9731296.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to help you understand the provided benchmark.

**Benchmark Overview**

MeasureThat.net is a platform that allows users to create and run JavaScript microbenchmarks. The website provides a JSON representation of the benchmark, which includes the script preparation code, HTML preparation code (which is empty in this case), and test cases.

In this specific example, we have two test cases: "Array clone with spread operator" and "Array clone with slice". The benchmark definition JSON represents a script that creates an array `list` and then clones it using different methods: the spread operator (`...`) and the `slice()` method.

**Options Compared**

The two options being compared are:

1. **Spread Operator (`...`)**: This method uses the spread operator to create a new copy of the original array.
2. **Slice Method (`slice()`)**: This method returns a shallow copy of the original array, starting from the first element and ending at the specified index.

**Pros and Cons**

* **Spread Operator (`...`)**:
	+ Pros:
		- Creates a deep copy of the original array, which is necessary for modifying the cloned array.
		- Can be more efficient than `slice()` for large arrays, since it avoids creating an intermediate array.
	+ Cons:
		- May be slower due to its overhead and the need to create a new object.
* **Slice Method (`slice()`)**
	+ Pros:
		- Faster than the spread operator, since it only creates an intermediate array.
	+ Cons:
		- Creates a shallow copy of the original array, which may not be sufficient for modifying the cloned array.

**Library and Purpose**

In this benchmark, we don't have any external libraries being used. However, if we were to add a library, some possibilities could include:

* **Lodash**: A popular utility library that provides various functions for working with arrays, including `cloneDeep()` which creates a deep copy of an array.
* **Array.prototype.slice()**: This is a built-in method in JavaScript that returns a shallow copy of the original array.

**Special JS Feature or Syntax**

In this benchmark, we're using the spread operator (`...`) and the `slice()` method, both of which are built-in features of JavaScript. The spread operator was introduced in ECMAScript 2015 (ES6), while the `slice()` method has been available since ES3.

**Other Alternatives**

If you need to clone an array in a different way, some alternative approaches could include:

* **Using `Array.prototype.map()`**: This can be used to create a new array by mapping each element of the original array.
* **Using a custom implementation**: Depending on your specific use case, you might be able to implement a custom cloning function that suits your needs.

Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to using the spread operator or `slice()` method.

Related benchmarks:

fdgfd ergfdg gergtdg (version: 0)

Comparing performance of: Array clone with spread operator vs Array clone with slice

Created: 2 years ago by: Guest

Jump to the latest result

Array clone with spread operator

Array clone with slice

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):