Benchmark: Ways of adding elements to an array

Tests:

concat and re-assign
let params = [ "hello", true, 7 ]; const addition = [1, 2, 3]; params = params.concat(addition);
Spread and re-assign
let params = [ "hello", true, 7 ]; const addition = [1, 2, 3] params = [ ...params, ...addition ]
Push with spread
const params = [ "hello", true, 7 ]; const addition = [1, 2, 3] params.push(...addition);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
concat and re-assign
Spread and re-assign
Push with spread

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 on MeasureThat.net.

**Benchmark Definition**

The provided JSON represents a benchmark definition for measuring the performance of different ways to add elements to an array in JavaScript. The benchmark definition consists of two parts:

1. **Script Preparation Code**: This section is empty, which means that no code needs to be executed before running each test case.
2. **Html Preparation Code**: This section is also empty, which implies that no HTML code needs to be generated or processed before running the tests.

**Individual Test Cases**

There are three individual test cases:

1. **concat and re-assign**
	* The benchmark definition contains a JavaScript snippet that uses the `concat` method to concatenate two arrays (`params` and `addition`) and then reassigns the result back to the `params` variable.
2. **Spread and re-assign**
	* This test case uses the spread operator (`...`) to concatenate the `params` array with the `addition` array, and then reassigns the result back to the `params` variable.
3. **Push with spread**
	* In this test case, the `push` method is used in conjunction with the spread operator to add elements from the `addition` array to the `params` array.

**Comparison of Approaches**

The three approaches differ in their usage of array methods:

1. **Concat and re-assign**: Uses the `concat` method to combine arrays.
2. **Spread and re-assign**: Uses the spread operator (`...`) to concatenate arrays.
3. **Push with spread**: Uses the `push` method with the spread operator to add elements to an array.

**Pros and Cons of Each Approach**

1. **Concat and re-assign**:
	* Pros: Simple, widely supported, and easy to read.
	* Cons: May be less efficient than other approaches, especially for large arrays.
2. **Spread and re-assign**:
	* Pros: More modern and efficient, as it leverages the spread operator's optimization in modern browsers.
	* Cons: Less readable and may not work consistently across older browsers or JavaScript engines.
3. **Push with spread**:
	* Pros: Efficient, as it avoids creating a new array by using `push` with the spread operator.
	* Cons: May be less readable than other approaches.

**Library Usage**

None of the provided benchmark definitions use external libraries.

**Special JS Features or Syntax**

The benchmark definition does not mention any special JavaScript features or syntax. However, the use of the spread operator (`...`) is a relatively modern feature introduced in ECMAScript 2015 (ES6).

**Alternative Approaches**

For adding elements to an array, other approaches might include:

1. Using `Array.prototype.push.apply()`: This method applies the `push` operation to the end of the array.
2. Using `Array.prototype.concat().slice()`**: This approach combines arrays using `concat` and then slices off the first element of the result.

Keep in mind that these alternative approaches might not be relevant to this specific benchmark, as the focus is on comparing different ways to add elements to an array using `push`, spread, or `concat`.

Related benchmarks:

Ways of adding elements to an array (version: 0)

Compare ways of adding an array to another array

Comparing performance of: concat and re-assign vs Spread and re-assign vs Push with spread

Created: 7 years ago by: Guest

Jump to the latest result

concat and re-assign

Spread and re-assign

Push with 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):