Benchmark: Array concat vs spread operator vs push 303

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Tests:

Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Push
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].push(...params);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat
spread operator
Push

Fastest: N/A

Slowest: N/A

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

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**Overview of the Benchmark**

The provided benchmark measures the performance difference between three methods for concatenating or pushing elements into an array: `concat()`, spread operator (`...`), and `push()`.

**Test Cases**

Each test case uses a specific scenario to compare the performance of these methods. The test cases are:

1. `Array.prototype.concat`: Concatenates an array with another array using the `concat()` method.
2. `spread operator`: Uses the spread operator (`...`) to concatenate two arrays.
3. `Push`: Pushes elements from one array into another using the `push()` method.

**Library and Special JS Features**

None of the test cases use any external libraries. However, the `Array.prototype.concat` method is a built-in JavaScript method that concatenates an array with another array.

The spread operator (`...`) was introduced in ECMAScript 2015 (ES6) as a new syntax for creating arrays from iterables or objects.

**Performance Comparison**

Here's a brief summary of each test case:

* `Array.prototype.concat`: Concatenates two arrays and returns the new array. This method creates a new array and copies elements from both arrays to it.
* `spread operator`: Uses the spread operator (`...`) to create a new array by concatenating two arrays. This method also creates a new array but is more concise than `concat()`.
* `Push`: Pushes all elements from one array into another using the `push()` method, which modifies the original array.

**Pros and Cons of Each Approach**

Here are some pros and cons of each approach:

* `Array.prototype.concat`:
	+ Pros: Well-established method, easy to read and understand.
	+ Cons: Creates a new array, can be slower for large arrays.
* `Spread operator (`...`):
	+ Pros: Concise syntax, creates a new array with minimal overhead.
	+ Cons: May have performance implications if used extensively in loops or recursive functions.
* `Push`:
	+ Pros: Modifies the original array, can be faster for large arrays.
	+ Cons: Less readable and maintainable than `concat()` or spread operator.

**Considerations**

When choosing between these methods, consider the following factors:

* Performance: If speed is critical, use the most efficient method. For large arrays, `push()` may be faster than `concat()`.
* Readability: Use `concat()` or spread operator for their readability and conciseness.
* Maintainability: Avoid using `Push` unless necessary due to its potential impact on code complexity.

**Alternatives**

Other alternatives for concatenating or pushing elements into an array include:

* Using the `Array.prototype.reduce()` method
* Utilizing a library like Lodash, which provides various array manipulation functions
* Implementing custom loops or recursive functions using techniques like iterating over arrays and modifying them in-place

Keep in mind that these alternatives may have different performance characteristics, readability, and maintainability compared to the original methods.

Related benchmarks:

Array concat vs spread operator vs push 303 (version: 0)

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: Array.prototype.concat vs spread operator vs Push

Created: 3 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

Push

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):