Benchmark: Arrayt concat vs spread 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 ]
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
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 and explain what's being tested, the different approaches compared, their pros and cons, and other considerations.

**Benchmark Purpose**

The primary goal of this benchmark is to compare the performance of three ways to concatenate or modify arrays in JavaScript:

1.  **Push**: Using the `push()` method to add elements to an array.
2.  **Spread Operator**: Utilizing the new ES6 spread operator (`...`) to merge arrays.
3.  **Concat()**: Employing the traditional `concat()` method to combine arrays.

**Library and Features**

There is no specific library being used in this benchmark. However, it's essential to note that using modern JavaScript features like the spread operator can vary in performance across different browsers and versions due to their implementation and optimization strategies.

**Individual Test Cases**

Each test case focuses on a specific way to achieve array concatenation or modification:

1.  **Array.prototype.concat**: This test evaluates the performance of the traditional `concat()` method when used with an existing array (`[ 1, 2 ]`) and another array (`params`).
2.  **Spread Operator**: The spread operator is used with an existing array (`[ 1, 2 ]`) and a new array (`params`) using the syntax `[...params]`.
3.  **Push**: This test tests the performance of adding elements to an array using the `push()` method.

**Options Comparison**

Here's a comparison of the three approaches:

*   **Push Method**:
    *   Pros: Often more efficient than other methods since it modifies the original array, reducing the need for creating a new one. It's also more intuitive and easy to use.
    *   Cons: Requires multiple `push()` calls if you want to add all elements at once, which can be less readable and may lead to issues with maintainability.
*   **Concat() Method**:
    *   Pros: Allows for creating a new array by concatenating existing arrays. This approach is often more readable and easier to understand.
    *   Cons: Requires creating a new array and copying all elements, which can be memory-intensive and slower than other methods.
*   **Spread Operator**:
    *   Pros: Offers a concise way to merge arrays without creating a new one. It's also relatively efficient since it doesn't require explicit looping or array manipulation.
    *   Cons: Performance may vary depending on the browser and its support for the spread operator. Additionally, this approach might be less intuitive than other methods.

**Considerations**

*   When working with large datasets, using `push()` can be a more efficient choice since it modifies the original array and reduces memory allocation.
*   For smaller arrays or when readability is crucial, using the `concat()` method or spread operator might be a better fit. However, for performance-critical code, benchmarking should be conducted to determine the most suitable approach.

**Alternatives**

Some alternative approaches to consider:

*   **Array.prototype.slice()**: This method creates a shallow copy of an array, which can be useful if you want to avoid modifying the original array.
*   **Array.from() and Destructuring**: Using `Array.from()` in conjunction with destructuring can provide another efficient way to merge arrays.
*   **Browser-specific optimizations**: Depending on the browser being used, there might be specific optimization strategies or built-in functions that can improve performance for certain use cases.

It's essential to note that the choice of approach ultimately depends on your specific use case, performance requirements, and personal preference.

Related benchmarks:

Arrayt concat vs spread 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 Push

Created: 6 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):