Benchmark: Array.prototype.concat vs spread operator vs push

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 27 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Overview**

The benchmark compares three different ways to combine two arrays in JavaScript:

1. `Array.prototype.concat()`
2. The new ES6 spread operator (`...`)
3. jQuery's `$merge()` method (not a standard JavaScript method, but rather a part of the jQuery library)

**Options Compared**

Here's what each option does differently:

* `Array.prototype.concat()`: This method takes two or more arrays and returns a new array that contains all the elements from each input array.
* Spread operator (`...`): When used with an array literal, the spread operator creates a new array by copying all elements from the original array into a new array. When used with `concat()`, it allows for more readable code by making the spread operator equivalent to `push(...)` or `[ ...].concat(...)`.
* jQuery merge (`$merge()`): This method is not part of the standard JavaScript API and is specific to the jQuery library. It takes two arrays as input and returns a new array that contains all elements from both arrays.

**Pros and Cons**

Here's a brief overview of each option:

* `Array.prototype.concat()`: Pros: widely supported, efficient. Cons: can be less readable due to method chaining.
* Spread operator (`...`): Pros: more readable, concise syntax. Cons: may not be supported in older browsers or versions of JavaScript.
* jQuery merge (`$merge()`): Pros: specific solution for jQuery users. Cons: not part of the standard JavaScript API, may not be familiar to non-JQuery developers.

**Library and Syntax**

The spread operator is a new feature introduced in ECMAScript 2018 (ES2018). It allows for more concise syntax when creating arrays or objects.

**Benchmark Preparation Code**

Not applicable in this case, as there is no preparation code provided.

**Test Cases**

Each test case demonstrates one of the three options being compared:

1. `Array.prototype.concat()`: Demonstrates the traditional method of concatenating two arrays.
2. Spread operator (`...`): Shows how to use the spread operator to combine two arrays in a more readable way.
3. jQuery merge (`$merge()`): Illustrates how jQuery's specific merge function can be used to concatenate arrays.

**Other Alternatives**

Other ways to concatenate arrays in JavaScript include:

* Using `push(...)` or `[ ...].concat(...)`
* Using `Array.prototype.push.apply()` (less common)
* Using a loop to iterate over one array and push elements onto the other

Keep in mind that these alternatives may not be as concise or readable as using the spread operator or `concat()`.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/103.0.0.0 Safari/537.36

Browser/OS: Chrome 103 on Linux

View result in a separate tab

Test name	Executions per second
Array.prototype.concat	8307601.0 Ops/sec
spread operator	51137372.0 Ops/sec
jQuery merge	0.0 Ops/sec
Push	65481384.0 Ops/sec

Related benchmarks:

Array.prototype.concat vs spread operator 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: 6 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 27 days ago):