Benchmark: Test array spread 2

Tests:

Test spread
const array1 = [1,2,3,4,5,6,7,8,9]; const array2 = [1,2,3,4,5,6,7,8,9]; const result = [...array1, ...array2];
Push
const array1 = [1,2,3,4,5,6,7,8,9]; const array2 = [1,2,3,4,5,6,7,8,9]; const result = []; result.push(...array1); result.push(...array2);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Test spread
Push

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36

Browser/OS: Chrome 109 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Test spread	27544960.0 Ops/sec
Push	50015440.0 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 benchmark and its components.

**Benchmark Definition**
The provided JSON represents a JavaScript microbenchmark named "Test array spread 2". It defines two test cases:

1. **Test spread**: This test case measures the performance of using the spread operator (`...`) to merge two arrays.
2. **Push**: This test case measures the performance of pushing elements from one or more arrays onto another array using the `push` method.

**Options compared**
In both test cases, the options being compared are:

* Using the spread operator (`...`)
* Using the `push` method

These two approaches serve different purposes:

* The spread operator is used to create a new array by copying elements from an existing array(s).
* The `push` method is used to add one or more elements to the end of an existing array.

**Pros and Cons**

### Spread Operator (`...`)

Pros:

* More concise and expressive way to merge arrays.
* Can be more readable, especially for those familiar with this syntax.

Cons:

* May incur a higher overhead due to the creation of a new array.
* Can lead to unexpected behavior if not used carefully (e.g., when working with large datasets).

### `push` method

Pros:

* More traditional and widely understood way to append elements to an array.
* Can be more efficient for larger arrays, as it avoids creating a new array.

Cons:

* Less concise and may require more lines of code.
* May lead to slower performance due to the overhead of creating a new array or updating the existing one.

**Other considerations**

When deciding between using the spread operator and the `push` method, consider the following factors:

* Readability: If you need to write a clear and concise piece of code, the spread operator might be a better choice.
* Performance: For large datasets, the `push` method might be more efficient.
* Familiarity: If your team is already using the `push` method for array operations, it might be worth sticking with that approach.

**Library usage**
There doesn't seem to be any specific library used in these benchmark test cases. However, the use of modern JavaScript features like spread operators and `const` declarations suggests that the tests are designed to target recent browser versions.

**Special JS feature or syntax**
The only notable special feature used here is the spread operator (`...`). This was introduced in ECMAScript 2015 (ES6) as part of the standard language specification. It allows for more concise array merging and has become a widely adopted feature in modern JavaScript development.

**Alternatives**

If you're interested in exploring alternative approaches or testing other variations, here are some potential alternatives:

* Using `Array.prototype.concat()`: This method concatenates two or more arrays and returns a new array.
* Using a library like Lodash: If you're working with large datasets or need to perform complex array operations, a utility library like Lodash can provide additional functionality and optimizations.

Keep in mind that these alternatives might not be as concise or expressive as the spread operator or `push` method, but they can still be useful for specific use cases.

Related benchmarks:

Test array spread 2 (version: 0)

Comparing performance of: Test spread vs Push

Created: one year ago by: Guest

Jump to the latest result

Test spread

Push

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):