Benchmark: Issou by Ruskie - MeasureThat.net

Tests:

Array.prototype.concat()
var arr = [ "foo", true, 7 ]; var other = [ 1, 2 ].concat(arr);
Spread operator
var arr = [ "foo", true, 7 ] var other = [ 1, 2, ...arr ]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat()
Spread operator

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

**What is tested on the provided JSON?**

The provided JSON represents a JavaScript microbenchmark, specifically a comparison of two approaches to concatenate arrays: `Array.prototype.concat()` and the spread operator (`...`).

**Options compared:**

There are only two options being compared:

1. **`Array.prototype.concat()`**: This is a method that concatenates two or more arrays into a new array.
2. **Spread operator (`...`)**: This is a syntax that allows for spreading elements of an array into another array.

**Pros and Cons:**

**`Array.prototype.concat()`:**

Pros:

* Widely supported across browsers
* Easy to understand and use

Cons:

* Can be slower than the spread operator due to the overhead of method calls
* May incur additional memory allocation due to the creation of a new array

**Spread operator (`...`)**:

Pros:

* Can be faster than `Array.prototype.concat()` since it avoids method call overhead
* More concise and expressive syntax

Cons:

* Requires support for spread operators, which may not be available in older browsers or environments
* May cause issues with certain types of data (e.g., non-array values)

**Other considerations:**

When choosing between these two approaches, consider the following factors:

* Performance: If you need to concatenate arrays frequently, the spread operator might be faster. However, if compatibility is crucial, `Array.prototype.concat()` might be a safer choice.
* Code readability and expressiveness: The spread operator can make code more concise and readable.

**Library usage:**

There are no libraries mentioned in the provided JSON that would require special attention or consideration.

**Special JS features or syntax:**

The spread operator (`...`) is a relatively recent addition to JavaScript, introduced in ECMAScript 2015 (ES6). It's a powerful feature that allows for more expressive and concise code. However, it's not mentioned in the provided JSON, so no additional explanation is necessary.

**Other alternatives:**

If you're looking for alternative approaches to concatenate arrays, consider:

* Using `Array.prototype.push()` and `new Array()`: This approach involves pushing elements into a new array using the `push()` method.
* Using `String.join()`**: If you need to concatenate strings, you can use `String.join()` to concatenate an array of strings into a single string.

In conclusion, the provided JSON represents a simple comparison between two approaches to concatenate arrays: `Array.prototype.concat()` and the spread operator (`...`). The choice between these options depends on performance requirements, compatibility considerations, and code readability needs.

Latest run results:

Run details: (Test run date: 6 years ago)

User agent: Mozilla/5.0 (Linux; Android 6.0; UMIDIGI Z Build/MRA58K; wv) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/70.0.3538.80 Mobile Safari/537.36 [FB_IAB/Orca-Android;FBAV/191.0.0.22.98;]

Browser/OS: Chrome Mobile 70 on Android 6.0

View result in a separate tab

Test name	Executions per second
Array.prototype.concat()	3108804.2 Ops/sec
Spread operator	7987156.0 Ops/sec

Related benchmarks:

Issou by Ruskie (version: 0)

On va voir lequel est plus opti

Comparing performance of: Array.prototype.concat() vs Spread operator

Created: 6 years ago by: Guest

Jump to the latest result

Array.prototype.concat()

Spread operator

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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