Benchmark: Test push vs spread for simple array

Tests:

push
let a = [1, 2, 3, 4] a.push(5)
spread
let a = [1, 2, 3, 4] a = [...a, 5]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
push
spread

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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I'll break down the test case and explain what's being tested.

**Benchmark Definition**

The benchmark is designed to compare the performance of two approaches:

1. `push`: This method uses the `push()` method to add an element to the end of an array.
2. `spread`: This method uses the spread operator (`...`) to create a new array by copying the elements from the original array and then adds an element to it.

**Options Compared**

The two options being compared are:

* Using the `push()` method to append an element to an array
* Using the spread operator (`...`) to create a new array and then appending an element

**Pros and Cons of Each Approach**

1. **Push Method**
	* Pros:
		+ Simple and straightforward syntax.
		+ Wide browser support.
	* Cons:
		+ Can be slower than other approaches, especially for large arrays.
		+ May require more memory allocations.
2. **Spread Operator (...)
	* Pros:
		+ Creates a new array without modifying the original one.
		+ Can be faster than the `push()` method, especially for large arrays.
		+ More modern and efficient syntax.
	* Cons:
		+ Requires JavaScript engines that support the spread operator (most modern browsers, but some older ones might not).
		+ May have performance implications when used with large datasets.

**Other Considerations**

Both approaches can have performance implications depending on the specific use case. For example:

* When using the `push()` method, if the array is already full, pushing an element may require additional memory allocations and copies of existing elements.
* Using the spread operator (`...`) creates a new array without modifying the original one, which can be beneficial when working with large datasets.

**Library Usage**

There is no library explicitly mentioned in the benchmark definition. However, some JavaScript engines (like V8) might use internal libraries or APIs to optimize array operations. In this case, it's likely that the spread operator (`...`) is being used as a part of the standard ECMAScript specification.

**Special JS Feature/Syntax**

There are no special features or syntax mentioned in the benchmark definition. Both `push()` and the spread operator (`...`) are standard JavaScript methods.

**Alternatives**

If you want to compare other approaches, you might consider:

* Using `concat()`: This method creates a new array by copying elements from an existing array.
* Using a custom function: You could create a custom function that implements your own array appending logic.
* Comparing different data structures (e.g., using linked lists or dynamic arrays).

Keep in mind that the performance implications of each approach will depend on the specific use case and JavaScript engine being used.

Related benchmarks:

Test push vs spread for simple array (version: 0)

Comparing performance of: push vs spread

Created: 5 years ago by: Guest

Jump to the latest result

push

spread

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):