Benchmark: Array.prototype.concat vs spread operator vs Array.prototype.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 ]
array push
var params = [ "hello", true, 7 ]; params.push(1); params.push(2)

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Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat
spread operator
array 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 JSON data and explain what's being tested.

**Benchmark Definition**

The benchmark compares three different approaches to concatenate arrays in JavaScript:

1. `Array.prototype.concat()`
2. The ES6 spread operator (`...` syntax)
3. `Array.prototype.push()` method (appending elements to an array)

These methods are used to combine two or more arrays into a single array.

**Options Compared**

The benchmark compares the performance of these three approaches on a specific test case:

* `var params = [ "hello", true, 7 ];`
* `var other = [ 1, 2 ].concat(params);` (using `Array.prototype.concat()`)
* `var other = [ 1, 2, ...params ]` (using the ES6 spread operator)
* `var params.push(1); params.push(2)` (using `Array.prototype.push()` method)

**Pros and Cons of Each Approach**

Here's a brief overview of each approach:

1. **`Array.prototype.concat()`**:
	* Pros: Simple, widely supported, and easy to understand.
	* Cons: Can be slower than other methods, especially for large arrays.
2. **ES6 Spread Operator (`...` syntax)**:
	* Pros: Modern, efficient, and concise.
	* Cons: Requires ES6 support, and some older browsers may not execute it correctly.
3. **`Array.prototype.push()` method**:
	* Pros: Fast, flexible, and can be used to append elements to an array.
	* Cons: May require multiple iterations for large arrays, and can lead to performance issues if not optimized.

**Library Used**

In this benchmark, no specific library is mentioned, so it's assumed that the standard JavaScript libraries are being tested.

**Special JS Features/Syntax**

The ES6 spread operator (`...` syntax) is a relatively new feature introduced in ECMAScript 2015 (ES6). It allows for more concise array concatenation. However, as mentioned earlier, its support may be limited to newer browsers and environments.

**Other Alternatives**

If the benchmark were to include additional methods, other alternatives could be:

* Using `Array.prototype.reduce()` method
* Utilizing `Array.prototype.splice()` method for array manipulation
* Leveraging modern JavaScript features like `Promise.all()` or `async/await` for concurrent operations

Keep in mind that these alternatives might not directly compare the performance of array concatenation methods, but they could provide additional insights into efficient array manipulation techniques.

In summary, this benchmark aims to evaluate the performance of three popular methods for array concatenation in JavaScript: `Array.prototype.concat()`, ES6 spread operator (`...` syntax), and `Array.prototype.push()` method. By comparing these approaches, users can gain a better understanding of their relative performance characteristics and choose the most suitable method for their specific use cases.

Related benchmarks:

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

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

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

Created: 7 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

array 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):