Benchmark: Array concat vs spread operator vs push 2asdasd

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

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

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/92.0.4515.131 Safari/537.36

Browser/OS: Chrome 92 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Array.prototype.concat	7440910.0 Ops/sec
spread operator	29209950.0 Ops/sec
Push	51345136.0 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 benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is designed to compare three ways of concatenating or modifying arrays in JavaScript:

1. `Array.prototype.concat()`
2. The new ES6 spread operator (`[ ... ]`)
3. The `push()` method

**What's being tested?**

In each test case, an array `params` is created with some initial values, and then a second array `other` is created using one of the three methods above to add two more elements to `params`. The benchmark measures the execution time for each of these operations.

**Options compared**

* `Array.prototype.concat()`: This method concatenates an existing array with a new array or value. It creates a new array and returns it.
* New ES6 spread operator (`[ ... ]`): This syntax allows you to create a new array by spreading the elements of an existing array into a new one.
* `push()` method: This method adds one or more elements to the end of an array.

**Pros and Cons**

Here's a brief summary:

* `Array.prototype.concat()`:
	+ Pros: Widely supported, easy to use, and flexible. It can concatenate arrays with different types (arrays, values).
	+ Cons: Creates a new array, which can be inefficient for large arrays.
* New ES6 spread operator (`[ ... ]`):
	+ Pros: Creates a shallow copy of the original array, which is more efficient than `concat()` for large arrays. It's also concise and expressive.
	+ Cons: Requires JavaScript 2015 or later to use, and it only works with arrays.
* `push()` method:
	+ Pros: Efficient and non-destructive (modifies the original array).
	+ Cons: Only works on arrays, not on other data structures.

**Library and special JS features**

In this benchmark, no libraries are used. However, it does use the new ES6 spread operator, which is a feature introduced in JavaScript 2015.

**Other alternatives**

If you need to concatenate or modify arrays in JavaScript, here are some alternative approaches:

* Using `Array.prototype.slice()` and then concatenating with `+`:
```javascript
var other = params.slice().concat([1, 2]);
```
* Using `Array.prototype.reduce()`:
```javascript
var other = params.reduce((acc, val) => acc.concat(val), []);
```
* Using `Array.prototype.forEach()` with a callback function:
```javascript
params.forEach(function(val) {
  var newParams = [val, ...newParams];
});
```
Note that these alternatives have different performance characteristics and may not be as efficient or concise as the spread operator.

Overall, the benchmark provides a good comparison of three common ways to concatenate or modify arrays in JavaScript, highlighting the trade-offs between efficiency, conciseness, and flexibility.

Related benchmarks:

Array concat vs spread operator vs push 2asdasd (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 Push

Created: 3 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

Push

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):