Benchmark: js array push,spread,concat single item

Tests:

push
const arr = [1,2,3]; arr.push(4);
spread
const arr = [1,2,3]; [...arr, 4]
concat
const arr = [1,2,3]; arr.concat([4])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
push
spread
concat

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/79.0.3945.130 Safari/537.36

Browser/OS: Chrome 79 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
push	25561632.0 Ops/sec
spread	21512484.0 Ops/sec
concat	6756018.5 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON benchmark definitions and explain what is being tested, compared, and other considerations.

**Benchmark Definition JSON**

The JSON represents a benchmark definition with four required fields:

1. `Name`: A unique name for the benchmark.
2. `Description`: An optional description of the benchmark (empty in this case).
3. `Script Preparation Code`: An optional code to prepare the script before running the benchmark (also empty in this case).
4. `Html Preparation Code`: An optional code to prepare the HTML before running the benchmark (also empty in this case).

**Individual Test Cases**

There are three test cases, each with two fields:

1. `Benchmark Definition`: A JavaScript code snippet that defines a simple array and performs one of three operations:
	* `push`: Adds a single item to the end of the array.
	* `spread`: Creates a new array by spreading the existing array and appending a single item.
	* `concat`: Concatenates an array with another array containing a single item.
2. `Test Name`: A unique name for each test case (matching the corresponding operation).

**Library Usage**

None of the provided benchmark definitions use any external libraries.

**Special JS Features or Syntax**

There is no mention of special JavaScript features or syntax in the provided benchmark definitions.

**Comparison and Approaches**

The three approaches are compared based on their performance:

1. **`push`**: Adds a single item to the end of an array.
2. **`spread`**: Creates a new array by spreading the existing array and appending a single item.
3. **`concat`**: Concatenates an array with another array containing a single item.

**Pros and Cons**

Here are some pros and cons for each approach:

1. **`push`**:
	* Pros: Simple, efficient, and widely supported.
	* Cons: May have performance implications if the array is large or frequently modified.
2. **`spread`**:
	* Pros: Creates a new array without modifying the original one, which can be beneficial for performance and code readability.
	* Cons: May incur overhead due to the creation of a new array, especially for large arrays.
3. **`concat`**:
	* Pros: Concatenates two arrays in a single operation, which can be more efficient than using `push` or `spread`.
	* Cons: May have performance implications if the concatenated array is large or frequently modified.

**Other Considerations**

When choosing between these approaches, consider factors such as:

* Performance requirements: If high-performance is critical, `push` might be a better choice.
* Code readability and maintainability: `spread` can make the code more readable by creating a new array without modifying the original one.
* Browser support: All three approaches are widely supported, but some older browsers may have performance issues with `spread`.

**Alternatives**

Other alternatives to consider when testing array operations include:

* Using an existing library like Lodash or Ramda for array manipulation
* Implementing custom array operations using native JavaScript features like `map`, `filter`, and `reduce`
* Using a benchmarking framework that supports more complex scenarios, such as parallel execution or multiple iteration orders.

Related benchmarks:

js array push,spread,concat single item (version: 0)

Comparing performance of: push vs spread vs concat

Created: 4 years ago by: Guest

Jump to the latest result

push

spread

concat

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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