Benchmark: JS arrays.. - MeasureThat.net

Script Preparation code:

var toAppend = Array(1).fill("jhd");
var original = [ "first", "second", "third" ];

Tests:

Concat
var res = original.concat(toAppend);
Push
var res = original.push(...toAppend);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Concat
Push

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.1:latest, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript benchmarking!

The provided JSON represents a benchmark test case for comparing the performance of two array manipulation methods: `concat` and `push`.

**Benchmark Definition**

The test case, "JS arrays...", measures the time taken to perform different array operations. The script preparation code creates an original array `original` with three elements and an auxiliary array `toAppend` containing a single element.

**Individual Test Cases**

There are two test cases:

1. **Concat**: This test case uses the `concat` method to append all elements from the `toAppend` array to the `original` array.
2. **Push**: This test case uses the `push` method to add each element from the `toAppend` array to the end of the `original` array, using the spread operator (`...`) to unpack the auxiliary array.

**Latest Benchmark Result**

The latest benchmark results show the execution speed (Executions Per Second) for both test cases on a desktop machine running Safari 13 on macOS High Sierra (10.14.6).

Now, let's discuss what's being tested and the pros and cons of each approach:

**What's Being Tested**

Both test cases measure the performance of appending elements to an existing array.

* In the **Concat** case, we're using the `concat` method, which creates a new array containing all elements from both arrays.
* In the **Push** case, we're using the `push` method, which modifies the original array by adding elements to its end.

**Pros and Cons**

Here are the key differences between the two approaches:

* **Concat**:
	+ Pros: Creates a new array with all elements from both sources, making it suitable for scenarios where you need to preserve the original array.
	+ Cons: May be slower than `push` because it creates a new array.
* **Push**:
	+ Pros: Modifies the original array, which can be beneficial when working with large datasets or optimizing memory usage.
	+ Cons: May not be suitable for scenarios where you need to preserve the original array.

**Other Considerations**

When choosing between `concat` and `push`, consider the following:

* If you need to create a new array with all elements from both sources, use **Concat**.
* If you're working with large datasets or optimizing memory usage, and modifying the original array is acceptable, use **Push**.

**Alternatives**

Other alternatives for appending elements to an existing array include:

* Using ` splice()` to insert elements at specific indices.
* Creating a new array using `map()`, `filter()`, or other methods, depending on your specific requirements.

In conclusion, the benchmark test case measures the performance of two array manipulation methods: **Concat** and **Push**. Understanding the pros and cons of each approach will help you choose the best method for your specific use cases.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_14_6) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/13.1 Safari/605.1.15

Browser/OS: Safari 13 on Mac OS X 10.14.6

View result in a separate tab

Test name	Executions per second
Concat	4918863.0 Ops/sec
Push	4168731.5 Ops/sec

Related benchmarks:

JS arrays.. (version: 1)

Comparing performance of: Concat vs Push

Created: 4 years ago by: Registered User

Jump to the latest result

Concat

Push

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.1:latest, generated 26 days ago):