Benchmark: Array.prototype.concat vs spread operator no jq

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 ]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat
spread operator

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

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

**Benchmark Purpose:**
The benchmark is designed to compare two approaches for concatenating arrays in JavaScript:

1. The traditional `Array.prototype.concat()` method
2. The new ES6 spread operator (`...`)

**Options Compared:**

* `concat()`: A built-in JavaScript method that takes one or more arrays as arguments and returns a new array containing all the elements from the original arrays.
* Spread operator (`...`): A new syntax introduced in ECMAScript 2015 (ES6) for creating a new array by spreading the elements of an existing array.

**Pros and Cons:**

* `concat()`: Pros:
	+ Well-established and widely supported
	+ Can handle any type of array element, not just primitive values
Cons:
	+ Less readable code when dealing with multiple arrays
	+ May lead to performance issues if dealing with large arrays
* Spread operator (`...`): Pros:
	+ More concise and readable code
	+ Efficient for small to medium-sized arrays
Cons:
	+ Not supported in older browsers (before ES6)
	+ May not work as expected when dealing with complex array structures

**Library Usage:**
There is no explicit library mentioned in the benchmark definition or test cases. However, it's worth noting that some libraries like Lodash may provide additional utility functions for array manipulation, which could potentially impact performance.

**Special JS Feature/Syntax:**
The spread operator (`...`) was introduced as a new syntax in ECMAScript 2015 (ES6). This means that older browsers and environments may not support it out of the box. However, since Chrome 77 is mentioned as a benchmarking browser, it's likely that this browser supports ES6 features.

**Alternative Approaches:**
Other approaches for concatenating arrays include:

* Using `Array.prototype.push()` in a loop
* Using `Array.prototype.concat()` with an array of arrays
* Using a library like Lodash or Ramda for more advanced array manipulation

Keep in mind that the choice of approach depends on the specific use case and performance requirements.

I hope this explanation helps you understand what's being tested in the benchmark!

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3865.75 Safari/537.36

Browser/OS: Chrome 77 on Linux

View result in a separate tab

Test name	Executions per second
Array.prototype.concat	3549534.2 Ops/sec
spread operator	12111640.0 Ops/sec

Related benchmarks:

Array.prototype.concat vs spread operator no jq (version: 0)

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

Comparing performance of: Array.prototype.concat vs spread operator

Created: 5 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

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):