Benchmark: Simple array spread vs array push execution

Tests:

Spread
var params = [ "hello", true, 7 ]; params = [...params, 1]
Push
var params = [ "hello", true, 7 ] params.push(1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread
Push

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's dive into the world of JavaScript microbenchmarks!

**What is being tested?**

The provided JSON represents a benchmark test case that compares two approaches for adding an element to an array: using the spread operator (`[...params, 1]`) and using the `push()` method (`params.push(1)`).

**Options compared:**

Two options are being compared:

1. **Spread Operator**: Using the spread operator to create a new array with the original elements and the additional element.
2. **Push Method**: Using the `push()` method to add an element to the end of the array.

**Pros and Cons:**

* **Spread Operator:**
	+ Pros:
		- Can be more readable and concise, especially for small arrays.
		- Creates a new array, which can be beneficial if you need to use the original array later.
	+ Cons:
		- May incur additional memory allocation and copying overhead.
		- Not all browsers support the spread operator in this context (prior to Chrome 77).
* **Push Method:**
	+ Pros:
		- More widely supported by older browsers.
		- Can be more efficient, as it only modifies the existing array without creating a new one.
	+ Cons:
		- May be less readable and less concise than using the spread operator.

**Library usage:**

The benchmark test case does not use any external libraries. However, if you were to implement this benchmark in a real-world scenario, you might consider using libraries like `lodash` or `ramda`, which provide utility functions for working with arrays, including adding elements with the spread operator.

**Special JavaScript features or syntax:**

There are no special JavaScript features or syntax being tested in this benchmark. The only notable feature is the support for the spread operator, but that's not unique to this test case.

**Other alternatives:**

If you wanted to add another approach to the benchmark, here are some alternative methods:

1. **Using `concat()`**: `params = params.concat([1])`
2. **Using `slice()` and assignment**: `var newParams = params.slice(); newParams.push(1);`
3. **Using a custom array creation function**: `function createArray(arr, elem) { return arr.concat(elem); } params = createArray(params, 1)`

Keep in mind that each of these alternatives has its own pros and cons, and the best approach will depend on your specific use case.

In conclusion, this benchmark test case provides a simple yet informative comparison between two common approaches for adding elements to an array. By understanding the trade-offs and considerations involved, you can make more informed decisions about how to implement similar benchmarks in your own projects.

Related benchmarks:

Simple array spread vs array push execution (version: 0)

Comparing performance of: Spread vs Push

Created: 4 years ago by: Guest

Jump to the latest result

Spread

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):