Benchmark: Push vs Spreadf2323423

Tests:

Array.prototype.concat
let pokemon = ['Arbok', 'Raichu', 'Sandshrew']; pokemon = ['Bulbasaur', ...pokemon, 'Metapod', 'Weedle', ]
spread operator
let pokemon = ['Arbok', 'Raichu', 'Sandshrew']; pokemon = [...pokemon, 'Bulbasaur', 'Metapod', 'Weedle']
Push
let pokemon = ['Arbok', 'Raichu', 'Sandshrew']; pokemon.push('Bulbasaur') pokemon.push('Metapod') pokemon.push('Weedle')

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

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

LLMs can make mistakes. Check important info.

The provided JSON represents a JavaScript microbenchmark created using MeasureThat.net. The benchmark compares the performance of three approaches for adding elements to an array: the traditional `concat()` method, the spread operator (`...`), and the `push()` method.

**What is tested?**

*   **Push Method**: This approach uses the `push()` method to add one or more elements to the end of an array. The `push()` method takes a variable number of arguments and returns the new length of the array.
*   **Array.prototype.concat() Method**: This approach uses the `concat()` method to create a copy of the original array and then adds one or more elements to the new array using the `push()` method. However, this approach creates an intermediate array, which can lead to higher memory usage compared to other methods.
*   **Spread Operator (`...`)**: This approach uses the spread operator to create a new array that includes all elements from the original array and then adds one or more elements to the new array.

**Options Compared**

The benchmark compares the performance of these three approaches:

1.  `push()` method
2.  `concat()` method (with an intermediate array)
3.  Spread operator (`...`)

These options have different pros and cons:

*   **Push Method**: This approach is simple and efficient, as it doesn't create any intermediate arrays. However, it can be slower for large arrays due to the overhead of repeatedly calling `push()`.
*   **Array.prototype.concat() Method**: This approach creates an intermediate array, which can lead to higher memory usage compared to other methods. However, it is often faster than using `push()` or the spread operator, especially for small arrays.
*   **Spread Operator (`...`)**: This approach is efficient and doesn't create any intermediate arrays, making it suitable for large arrays. However, it may be slower than the traditional `concat()` method for small arrays.

**Other Considerations**

When choosing between these approaches, consider the following factors:

*   **Array Size**: For large arrays, the spread operator (`...`) is often the most efficient approach due to its ability to avoid creating intermediate arrays.
*   **Performance**: If performance is critical and you're dealing with small arrays, using `concat()` or `push()` may be faster than using the spread operator.
*   **Memory Usage**: For large arrays where memory usage is a concern, using the spread operator (`...`) can help reduce memory usage by avoiding intermediate array creation.

**Library/Features Used**

In this benchmark, no libraries are used other than standard JavaScript. However, some features like `push()` and `concat()` methods are native to JavaScript and don't require any external dependencies.

**Special JS Features/Syntax**

No special JavaScript features or syntax are used in this benchmark.

The alternative approaches for adding elements to an array include:

*   **Array.prototype.set() Method**: This method sets one or more elements at specific indices of an array. While not directly comparable to `push()` and `concat()`, it can be used to achieve similar functionality.
*   **Array.prototype.splice() Method**: This method adds, removes, or replaces elements in an array. It can be used to add new elements to the end of an array but may have different performance characteristics compared to `push()` and `concat()`.

Related benchmarks:

Push vs Spreadf2323423 (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>

Fastest: N/A

Slowest: N/A

No previous run results

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