Benchmark: concat vs spread vs push (performance)

Tests:

concat
var params = ["hello", true, 7]; var other = params.concat([1]);
spread
var params = ["hello", true, 7] var other = [...params, 1]
push
var params = ["hello", true, 7]; params.push(1);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
concat
spread
push

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what is being tested.

**Benchmark Definition**

The benchmark is comparing three different approaches to concatenate an array with another value:

1. **`concat()` method**: A traditional way of concatenating arrays using the `concat()` method.
2. **Spread operator (`...`)**: The new ES6 spread operator, introduced in JavaScript 2015, allows for more concise and expressive array manipulation.
3. **`push()` method**: Another way to concatenate an array by adding a value at the end of the array using the `push()` method.

**Test Cases**

Each test case represents a specific scenario where these three approaches are used:

1. **`concat()`**: Creating an array `params` with initial values and concatenating it with another array `[1]`.
2. **Spread operator (`...`)**: Creating an array `params` with initial values and spreading it to create a new array, which is then concatenated with another value `[1]`.
3. **`push()`**: Creating an array `params` with initial values and pushing the value `[1]` onto the end of the array.

**Library**

None of these test cases use any external libraries or dependencies.

**Special JS Features/Syntax**

There are no special JavaScript features or syntax being used in these test cases. They are using standard JavaScript syntax for arrays and concatenation.

**Options Compared**

The benchmark is comparing three different approaches to concatenate an array with another value:

* `concat()`: A traditional way of concatenating arrays
* Spread operator (`...`): The new ES6 spread operator, introduced in JavaScript 2015
* `push()`: Another way to concatenate an array by adding a value at the end

**Pros and Cons**

Each approach has its own trade-offs:

* **`concat()`**:
	+ Pros: Simple and widely supported
	+ Cons: Can be slower than other methods, especially for large arrays
* **Spread operator (`...`)**
	+ Pros: More concise and expressive, can create new arrays without modifying the original array
	+ Cons: Requires JavaScript 2015 or later, may not work in older browsers or environments
* **`push()`**:
	+ Pros: Efficient and fast way to add elements to an array
	+ Cons: May modify the original array, not suitable for concatenating arrays

**Other Alternatives**

If `concat()`, spread operator (`...`), or `push()` are not suitable, other alternatives can be considered:

* Using a library like Lodash's `concat` function or the `Array.prototype.concat()` method
* Using a different data structure, such as a Linked List or a Stack
* Using a different approach, such as using a binary search tree or a hash table to store and retrieve elements

Keep in mind that these alternatives may have their own trade-offs and performance characteristics.

Latest run results:

Run details: (Test run date: 5 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.109 Safari/537.36

Browser/OS: Chrome 72 on Mac OS X 10.13.4

View result in a separate tab

Test name	Executions per second
concat	6515706.0 Ops/sec
spread	23590176.0 Ops/sec
push	26020294.0 Ops/sec

Related benchmarks:

concat vs spread vs push (performance) (version: 0)

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

Comparing performance of: concat vs spread vs push

Created: 5 years ago by: Guest

Jump to the latest result

concat

spread

push

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):