Benchmark: Array.prototype.concat vs spread vs push

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Tests:

Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
jQuery merge
var params = [ "hello", true, 7 ]; var other = $.merge([1, 2], params);
Push
var params = [ "hello", true, 7 ]; params.push(1); params.push(2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat
spread operator
jQuery merge
Push

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested, compared, and their pros and cons.

**Benchmark Overview**

The benchmark is designed to compare the performance of three approaches:

1. `Array.prototype.concat()`
2. The new ES6 spread operator (`...`)
3. jQuery's `$merge()` method

These approaches are used to concatenate two arrays: one with a fixed set of elements (`[ 1, 2 ]`) and another with variable-length elements (`"hello", true, 7`).

**Test Case Analysis**

Here's a brief analysis of each test case:

1. `Array.prototype.concat()`: This method creates a new array by concatenating the two input arrays.
	* Pros: Well-established and widely supported; easy to understand and implement.
	* Cons: Can be slower due to the overhead of creating a new array object.
2. Spread Operator (`...`): This operator allows you to create a new array by spreading its elements into an existing array.
	* Pros: Fast and efficient, as it doesn't require creating a new array object; widely supported in modern browsers.
	* Cons: May not work as expected if the spread operator is used with other operators (e.g., `Array.from()`).
3. jQuery merge (`$.merge()`): This method merges two arrays into one.
	* Pros: Easy to use and understand, especially for developers familiar with jQuery; can be faster than creating a new array object.
	* Cons: jQuery's API is not as lightweight as native JavaScript solutions; may add unnecessary overhead due to jQuery's complexity.

**Other Considerations**

When choosing between these approaches, consider the following factors:

* Performance: If you prioritize speed, the spread operator might be the best choice. However, if you're targeting older browsers or environments with limited resources, `Array.prototype.concat()` might be a better option.
* Code readability and maintainability: If code readability is crucial for your project, the spread operator's concise syntax might be an attractive choice. On the other hand, if clarity and simplicity are more important, `Array.prototype.concat()` could be a better fit.

**Device Platform and Browser Variations**

The benchmark results show variations in performance across different browsers (Chrome 74) and devices (Desktop). This highlights the importance of considering device-specific factors when optimizing your code for various environments.

In conclusion, this benchmark provides a useful comparison of three approaches to concatenating arrays. By understanding the pros and cons of each approach, developers can choose the best solution for their specific use case, taking into account performance, code readability, and compatibility considerations.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/74.0.3729.131 Safari/537.36

Browser/OS: Chrome 74 on Mac OS X 10.14.4

View result in a separate tab

Test name	Executions per second
Array.prototype.concat	4765115.5 Ops/sec
spread operator	22262662.0 Ops/sec
jQuery merge	3318667.2 Ops/sec
Push	35457900.0 Ops/sec

Related benchmarks:

Array.prototype.concat vs spread vs push (version: 0)

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

Comparing performance of: Array.prototype.concat vs spread operator vs jQuery merge vs Push

Created: 5 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

jQuery merge

Push

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 29 days ago):