Benchmark: kitesurfing is cool

Tests:

one
var item = {id:1}; var arr = [{id:3},{id:4}]; arr.push(item);
two
var item = {id:1}; var arr = [{id:3},{id:4}]; arr = [...arr,item];
three
var item = {id:1}; var arr = [{id:3},{id:4}]; arr.concat([item])

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
one
two
three

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/89.0.4389.90 Safari/537.36

Browser/OS: Chrome 89 on Linux

View result in a separate tab

Test name	Executions per second
one	23321398.0 Ops/sec
two	4381685.5 Ops/sec
three	4409739.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of MeasureThat.net and explore what's tested in this specific benchmark.

**Benchmark Definition**
The benchmark definition is essentially a piece of JavaScript code that represents a test case. In this case, there are three test cases:

1. `var item = {id:1};\r\nvar arr = [{id:3},{id:4}];\r\narr.push(item);`
2. `var item = {id:1};\r\nvar arr = [{id:3},{id:4}];\r\narr = [...arr,item];`
3. `var item = {id:1};\r\nvar arr = [{id:3},{id:4}];\r\narr.concat([item])`

These test cases are designed to measure the performance of different approaches for adding an element to an array.

**Options Compared**
The three options compared are:

1. **Push**: The `push` method is used to add an element to the end of an array.
2. **Spread Operator (`...`)**: The spread operator is used to create a new array by spreading the elements of another array, and then adding a new element to it.
3. **Concatenation**: The `concat` method is used to concatenate two arrays, which effectively adds a new element to the end of the original array.

**Pros and Cons**

* **Push**:
	+ Pros: Simple and straightforward, widely supported.
	+ Cons: Can be slower than other methods for large datasets due to array resizing.
* **Spread Operator (`...`)**:
	+ Pros: More efficient and concise than `push`, especially for larger datasets. Creates a new array, which can be beneficial for performance.
	+ Cons: Requires JavaScript 2015+ syntax support, might not work in older browsers.
* **Concatenation**:
	+ Pros: Simple to implement, widely supported.
	+ Cons: Can create temporary arrays and perform additional copies of data, making it slower than other methods.

**Library Considerations**
None of the test cases explicitly use any libraries. However, the `push` method is an intrinsic JavaScript array method, while the spread operator (`...`) was introduced in ECMAScript 2015 and the `concat` method has been around for a long time.

**Special JS Features or Syntax**
The spread operator (`...`), introduced in ECMAScript 2015, allows creating a new array by spreading elements from another array. This is not supported in older browsers (e.g., Internet Explorer).

**Other Alternatives**

For adding an element to an array, other alternatives might include:

* Using `splice()` instead of `push`.
* Using `unshift()` instead of `concat` for adding elements to the beginning of an array.
* Using a library like Lodash's `array.push()` or `array.unshift()` methods for more concise code.

MeasureThat.net provides valuable insights into performance differences between various JavaScript array operations. The benchmark results can help developers and organizations optimize their code for better performance, especially when working with large datasets.

Related benchmarks:

kitesurfing is cool (version: 0)

Comparing performance of: one vs two vs three

Created: 3 years ago by: Guest

Jump to the latest result

one

two

three

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):