Benchmark: cloneasdfkjasdkjfaknjsdf ,masdf2

Script Preparation code:

var source = [];
for (let i = 0; i < 10000; i++) {
 	source.push(i); 
}

Tests:

push
const target = []; target.push(...source);
concat
const target = [].concat(source);
assign
const target = Object.assign({}, source);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
push
concat
assign

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.75 Safari/537.36

Browser/OS: Chrome 86 on Mac OS X 10.15.6

View result in a separate tab

Test name	Executions per second
push	29922.5 Ops/sec
concat	146874.0 Ops/sec
assign	500.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark definition and test cases to understand what is being tested.

**Benchmark Definition**

The benchmark definition provides two types of code: script preparation code and HTML preparation code. The script preparation code defines an array `source` with 10,000 elements using a `for` loop. This code is likely used to create a large dataset that will be used in the tests.

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

**Individual Test Cases**

There are three individual test cases:

1. **push**: This test case uses the `push` method to add elements from the `source` array to a target array.
2. **concat**: This test case uses the `concat` method to merge two arrays, one of which is the `source` array.
3. **assign**: This test case uses the `Object.assign` method to create a shallow copy of the `source` array.

**Library and Special JS Features**

None of the test cases use any external libraries. However, it's worth noting that the `concat` method uses the spread operator (`...`) which was introduced in ECMAScript 2015 (ES6). The `Object.assign` method is a built-in method that has been available since ECMAScript 2015 as well.

**Options Compared**

The three test cases compare different methods for adding or merging arrays:

* **push**: adds elements from the `source` array to a target array using the `push` method.
* **concat**: merges two arrays, one of which is the `source` array, using the `concat` method with the spread operator.
* **assign**: creates a shallow copy of the `source` array using the `Object.assign` method.

**Pros and Cons**

Here are some pros and cons for each approach:

* **push**:
	+ Pros: simple, efficient, and widely supported.
	+ Cons: can be slower than other methods due to the overhead of pushing elements onto an array.
* **concat**:
	+ Pros: allows for more control over the merging process, can be faster than `push` in some cases.
	+ Cons: requires using the spread operator, which may not be supported by older browsers or environments.
* **assign**:
	+ Pros: creates a shallow copy of the array, can be faster than `push` due to less overhead.
	+ Cons: may create unnecessary object references, can lead to performance issues in certain scenarios.

**Other Alternatives**

Some alternative methods for adding or merging arrays include:

* Using `Array.prototype.forEach` and `push`
* Using `Array.prototype.reduce` and `concat`
* Using a loop and the `+=` operator

It's worth noting that the choice of method ultimately depends on the specific use case and performance requirements.

Related benchmarks:

cloneasdfkjasdkjfaknjsdf ,masdf2 (version: 0)

Comparing performance of: push vs concat vs assign

Created: 4 years ago by: Guest

Jump to the latest result

push

concat

assign

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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