Benchmark: array methods test1231234

Script Preparation code:

var arr = [1, 2, 3];

Tests:

Array.prototype.concat
var other = arr.concat([99]);
Array.prototype.push
var other = arr.push(99);
Array.prototype.splice
var other = arr.splice(arr.length-1, 0, 99);
spread operator
var other = [ ...arr, 99 ]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat
Array.prototype.push
Array.prototype.splice
spread operator

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

**What is being tested?**

The provided JSON represents a set of test cases for measuring the performance of various array methods in JavaScript: `concat`, `push`, and the spread operator (`...`). The tests are designed to compare the execution times of these three methods when used with different arrays.

**Options compared:**

1. **`Array.prototype.concat()`**: This method creates a new array by copying elements from an existing array.
2. **`Array.prototype.push()`**: This method adds one or more elements to the end of an array and returns the new length of the array.
3. **Spread operator (`...`)**: This is a shorthand syntax for creating a new array from existing elements.

**Pros and cons:**

1. **`concat()`**:
	* Pros: Simple, intuitive, and widely supported.
	* Cons: Creates a new array, which can be memory-intensive for large datasets.
2. **`push()`**:
	* Pros: Modifies the original array in-place, reducing memory allocation.
	* Cons: May incur performance overhead due to repeated assignments.
3. **Spread operator (`...`)**:
	* Pros: Efficient, modern syntax that creates a new array without modifying the original.
	* Cons: Less intuitive for some developers and may not be supported in older browsers.

**Library usage:**

None of the provided test cases use any external libraries. The focus is solely on measuring the performance of JavaScript's built-in array methods.

**Special JS feature/syntax:**

The spread operator (`...`) is a relatively recent addition to JavaScript, introduced in ECMAScript 2018 (ES2018). It allows for concise array creation and modification.

**Benchmark preparation code:**

The script preparation code `var arr = [1, 2, 3];` creates an initial array of three elements. Each test case then performs a specific operation on this array to measure the performance of the corresponding array method.

**Other alternatives:**

To further improve benchmarking and testing, you could consider adding more test cases, such as:

* Comparing the performance of different data types (e.g., numbers, strings, objects) with each array method.
* Testing the performance of array methods on large datasets or edge cases.
* Incorporating additional metrics, like memory usage or garbage collection overhead.

By expanding the scope of your benchmarking effort, you can gain a more comprehensive understanding of JavaScript's array methods and their performance characteristics.

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36

Browser/OS: Chrome 85 on Windows

View result in a separate tab

Test name	Executions per second
Array.prototype.concat	2983940.0 Ops/sec
Array.prototype.push	8085965.0 Ops/sec
Array.prototype.splice	3241472.2 Ops/sec
spread operator	0.3 Ops/sec

Related benchmarks:

array methods test1231234 (version: 3)

Comparing performance of: Array.prototype.concat vs Array.prototype.push vs Array.prototype.splice vs spread operator

Created: 4 years ago by: Registered User

Jump to the latest result

Array.prototype.concat

Array.prototype.push

Array.prototype.splice

spread operator

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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