Benchmark: Array.from vs concat #2kjgkjgkj

Tests:

Array.from
var fooSet = new Set(); for(var i=0;i<100;i++) { fooSet.add(i); } var other = Array.from(fooSet);
concat
var fooSet = new Set(); for(var i=0;i<100;i++) { fooSet.add(i); } var other = [].concat(fooSet);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.from
concat

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 explanation of the provided JavaScript microbenchmark.

**What is being tested?**

The benchmark is comparing two approaches to convert a Set object to an array:

1. Using `Array.from()` method: This method creates a new, shallow-copied Array instance from an array-like or iterable object.
2. Using the `concat()` method with the spread operator (`...`): This method concatenates one or more arrays into a single array.

**Options being compared**

The two options are:

1. `Array.from()`: This approach creates a new array by iterating over the Set object and pushing each element to the array using the `push()` method.
2. `concat()`: This approach converts the entire Set object to an array, which can be slower due to the overhead of creating a new array instance.

**Pros and Cons**

* **Array.from()**:
	+ Pros: Generally faster and more efficient, as it avoids creating an intermediate array.
	+ Cons: May require additional memory for the created array.
* **concat()**:
	+ Pros: Can be beneficial when working with large datasets, as it allows for more control over the resulting array.
	+ Cons: Can be slower due to the overhead of creating a new array instance.

**Other considerations**

When deciding between these two approaches, consider the size of your dataset and the performance requirements of your application. If you need to work with very large datasets or require low memory usage, `Array.from()` might be a better choice. However, if you need more control over the resulting array or want to simplify your code, `concat()` could be a better option.

**Library**

In this benchmark, there is no external library being used, as both options are built-in methods of JavaScript.

**Special JS feature or syntax**

There are no special features or syntax being tested in this benchmark. The focus is on the performance comparison between two native JavaScript methods.

Now that we've explained the benchmark, let's take a look at some alternative approaches:

* Using `slice()` method: Similar to `concat()`, but with a more traditional array creation syntax.
* Using `Array.prototype.slice.call()` method: Creates a new array by copying elements from an iterable object using the `slice()` method.
* Using a custom implementation: Writing a custom function to convert a Set object to an array, which can provide optimal performance for specific use cases.

If you're interested in exploring alternative approaches or optimizing your code for performance, I'd be happy to help with that!

Related benchmarks:

Array.from vs concat #2kjgkjgkj (version: 0)

Comparing performance of: Array.from vs concat

Created: 5 years ago by: Guest

Jump to the latest result

Array.from

concat

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):