Benchmark: Array concat vs spread operatorfgfgf

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

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

Fastest: N/A

Slowest: N/A

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

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

**Benchmark Definition**
The benchmark is designed to compare three different methods for concatenating arrays in JavaScript:

1. **`concat()` method**: This method uses the `concat()` function to concatenate two or more arrays.
2. **Spread operator (`...`)**: This operator was introduced in ES6 (ECMAScript 2015) and allows you to expand an array by spreading its elements into another array.
3. **`push()` method**: This method adds one or more elements to the end of an array using the `push()` function.

**Benchmark Preparation Code**
There is no specific code provided, but we can infer that the benchmark assumes a basic JavaScript environment with arrays and the methods being tested are available.

**Individual Test Cases**

1. **`Array.prototype.concat`**: This test case uses the traditional `concat()` method to concatenate an array (`[ 1, 2 ]`) with another array containing some parameters (`"hello"`, `true`, and `7`).
2. **Spread operator**: In this test case, the spread operator is used to expand the `params` array into a new array called `other`. The syntax is `[ 1, 2, ...params ]`.
3. **`Push()` method**: This test case uses the `push()` method to add elements from an array (`params`) to another array (`[ 1, 2 ]`). The syntax is `Array.prototype.push.apply([ 1, 2], params);`.

**Library and Purpose**
None of these methods rely on external libraries.

**Special JS Feature or Syntax**
The spread operator (`...`) is a special feature introduced in ES6. It allows you to expand an array into another array by spreading its elements.

**Pros and Cons**

* **`concat()` method**:
	+ Pros: widely supported, easy to use.
	+ Cons: can be slower for large arrays due to the overhead of creating new objects.
* **Spread operator (`...`)**:
	+ Pros: concise, fast, and efficient for concatenating small arrays.
	+ Cons: not supported in older browsers or environments that don't support ES6.
* **`Push()` method**:
	+ Pros: can be faster than `concat()` for large arrays since it modifies the existing array.
	+ Cons: requires creating a new array instance, which can lead to memory allocation issues.

**Other Alternatives**
Before the spread operator was introduced, developers could use other methods like `Array.prototype.slice()`, `Array.prototype.splice()`, or even libraries like Lodash (`_.concat()`).

In summary, this benchmark compares three popular ways to concatenate arrays in JavaScript: the traditional `concat()` method, the concise and efficient spread operator, and the `push()` method.

Related benchmarks:

Array concat vs spread operatorfgfgf (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: 5 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

Push

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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