Benchmark: sample_benchmark

Script Preparation code:

var array = [1,2,3];

Tests:

array_unshift
array.unshift(0);
array_concat
array = array.concat([0])
array_spread
array = [0, ...array]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array_unshift
array_concat
array_spread

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks, allowing developers to compare different approaches to specific tasks. The provided JSON data represents two main components:

1. **Benchmark Definition**: This section defines the benchmark itself, including its name, description, script preparation code, and HTML preparation code (which is empty in this case).
2. **Individual Test Cases**: This section contains multiple test cases, each with a unique name and a corresponding JavaScript expression to be executed.

**Tested Expressions**

The individual test cases are designed to measure the performance of different approaches for modifying an array:

1. `array.unshift(0);`
2. `array = array.concat([0])`
3. `array = [0, ...array]`

These expressions demonstrate three distinct ways to modify an array in JavaScript.

**Comparison Options**

The test cases compare the following options:

1. **Push**: Using `unshift` or `concat` methods.
2. **Spread Operator**: Using the spread operator (`...`) with arrays.
3. **Array Destructure**: Using array destructuring with the rest parameter syntax (`[0, ...array]`).

**Pros and Cons**

Here's a brief summary of each approach:

1. **Push (unshift or concat)**:
	* Pros: Easy to implement, widely supported, and efficient for large arrays.
	* Cons: Creates a new array when using `concat`, which can lead to memory allocation overhead.
2. **Spread Operator**:
	* Pros: Efficient, concise, and creates a new array with minimal memory allocation.
	* Cons: Limited support in older browsers and may not work as expected with certain types of arrays.
3. **Array Destructure**:
	* Pros: Concise, efficient, and allows for easy handling of dynamic lengths.
	* Cons: May be less intuitive for developers unfamiliar with array destructuring.

**Libraries and Special Features**

None of the test cases use a specific library or special JavaScript feature (like async/await or Promises).

**Other Considerations**

When choosing an approach, consider factors like:

* Memory allocation overhead
* Browser support and version compatibility
* Code readability and maintainability

If you need to write performance-critical code, it's essential to understand the implications of each approach.

**Alternatives**

For alternative approaches, you can explore other methods for modifying arrays, such as:

1. Using `splice` or `slice` methods.
2. Implementing a custom array extension.
3. Utilizing SIMD (Single Instruction, Multiple Data) instructions (if available).

However, the test cases provided on MeasureThat.net focus on three common and widely supported approaches, making it an excellent starting point for comparing their performance in different scenarios.

Related benchmarks:

sample_benchmark (version: 0)

Comparing performance of: array_unshift vs array_concat vs array_spread

Created: 3 years ago by: Guest

Jump to the latest result

array_unshift

array_concat

array_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):