Benchmark: concat vs spread operator vs push

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, ...params ]
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
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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Let's dive into the world of JavaScript benchmarks!

**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark compares three approaches for concatenating arrays: the traditional `concat()` method, the new ES6 spread operator (`...`), and the `push()` method.

**What's being tested?**

In this benchmark, we have three test cases:

1. **Array.prototype.concat**: This test case uses the traditional `concat()` method to concatenate two arrays.
2. **Spread Operator (`...`)**: This test case uses the new ES6 spread operator to concatenate two arrays.
3. **Push**: This test case uses the `push()` method to add an element to an array and then concatenates the resulting array with another array.

**Options being compared**

The benchmark is comparing three approaches:

* `concat()`: The traditional method of concatenating arrays using the `concat()` method.
* Spread Operator (`...`): The new ES6 spread operator that allows you to concatenate arrays by spreading an array as an argument.
* Push: The `push()` method, which adds an element to an array and returns the length of the array. This test case uses it in a creative way to concatenate two arrays.

**Pros and Cons**

Here's a brief overview of each approach:

* **concat()**: Pros:
	+ Widely supported and understood.
	+ Can handle nested arrays.
Cons:
	+ Can be slower than other methods due to its overhead.
* **Spread Operator (`...`)**: Pros:
	+ Fast and efficient.
	+ Can be more readable in some cases.
Cons:
	+ May not work as expected with older browsers or versions of JavaScript.
* Push: This approach is not typically used for concatenating arrays, but it's interesting to see how the test case uses it. The pros and cons are:

Pros:
	+ None immediately apparent, as this is an unconventional use case.
Cons:
	+ Unpredictable performance, as the `push()` method modifies the original array.

**Library and Special JS Feature**

In this benchmark, there are no libraries or special JavaScript features being used other than the standard library functions. The ES6 spread operator is simply a new syntax feature that allows for more concise array concatenation.

**Other Considerations**

When evaluating performance, it's essential to consider factors like:

* Browser support: Older browsers may not support the spread operator.
* Version of JavaScript: Different versions of JavaScript may have varying levels of support for the spread operator and other modern features.
* Hardware and platform differences: Performance can vary significantly depending on the device and hardware used.

**Alternatives**

Other alternatives for array concatenation include:

* `Array.prototype.push()` followed by `concat()`: This approach uses the `push()` method to add elements to an array and then concatenates it with another array using `concat()`.
* `Array.prototype.map()` followed by `concat()`: This approach uses the `map()` method to create a new array and then concatenates it with another array using `concat()`.

Related benchmarks:

concat vs spread operator vs push (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: 7 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):