Benchmark: Chaining concat, spread, push spread, push single

Tests:

concat
var params = new Array(1000); let other = []; for (let x = 0; x < 100; ++x) { other = other.concat(params); } console.log(other);
spread push
var params = new Array(1000); let other = []; for (let x = 0; x < 100; ++x) { other.push(...params); } console.log(other);
spread
var params = new Array(1000); let other = []; for (let x = 0; x < 100; ++x) { other = [...other, ...params]; } console.log(other);
push single
var params = new Array(1000); let other = []; for (let x = 0; x < 100; ++x) { params.forEach(p => other.push(p)); } console.log(other);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
concat
spread push
spread
push single

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.

**Benchmark Definition**

The benchmark definition represents a single test case or "benchmark" that measures the performance of different approaches to concatenate arrays in JavaScript. There are four test cases:

1. `concat`: Uses the `concat()` method to combine two arrays.
2. `spread push`: Uses the spread operator (`...`) and the `push()` method to add elements to an array.
3. `spread`: Uses the spread operator (`...`) to create a new array by spreading existing arrays.
4. `push single`: Uses the `forEach()` loop with the `push()` method to iterate over an array and append its elements.

**Options Compared**

The benchmark compares the performance of different approaches to concatenate arrays:

* **Concatenation using `concat()`, spread operator (`...`), and `push()`**: These approaches test the efficiency of combining arrays in different ways.
* **Iteration using `forEach()` loop with `push()`**: This approach tests the performance of iterating over an array and appending its elements.

**Pros and Cons**

Here's a brief overview of the pros and cons of each approach:

1. **Concatenation using `concat()`, spread operator (`...`), and `push()`**:
	* Pros: Simple, easy to read, and well-supported in most browsers.
	* Cons: Can be slower due to the overhead of creating a new array or modifying an existing one.
2. **Iteration using `forEach()` loop with `push()`**:
	* Pros: Can be faster since it avoids the overhead of creating a new array or modifying an existing one.
	* Cons: May be less readable and less efficient for large arrays.

**Library and Special JS Features**

There are no specific libraries used in this benchmark. However, some features like `forEach()` loop with `push()` might require modern JavaScript versions (e.g., ECMAScript 2015+).

**Other Alternatives**

If you're interested in exploring alternative approaches to concatenate arrays or iterate over an array, consider the following:

* **Array.prototype.slice()**: A more traditional approach to creating a new array by slicing an existing one.
* **Array.prototype.reduce()**: An approach that uses the `reduce()` method to combine elements of two arrays.
* **Array.prototype.map()`: An approach that uses the `map()` method to create a new array with transformed elements.

These alternatives might provide different performance profiles and trade-offs in terms of readability and maintainability.

Related benchmarks:

Chaining concat, spread, push spread, push single (version: 0)

Comparing performance of: concat vs spread push vs spread vs push single

Created: 4 years ago by: Guest

Jump to the latest result

concat

spread push

spread

push single

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):