Benchmark: Array.prototype.concat vs spread operator no jquery 83e48

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, 2, ...params ]

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

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.114 Safari/537.36

Browser/OS: Chrome 91 on Linux

View result in a separate tab

Test name	Executions per second
Array.prototype.concat	6998508.0 Ops/sec
spread operator	21439712.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the benchmark.

**What is being tested?**

The provided JSON represents two test cases that compare the performance of the traditional `concat()` method with the new ES6 spread operator (`...`) in JavaScript. The tests are specifically designed to measure which approach is faster for concatenating arrays.

**Options compared:**

Two options are being compared:

1. **Array.prototype.concat()**: This is a traditional method used to concatenate two or more arrays in JavaScript.
2. **Spread operator (`...`)**: Introduced in ES6, this operator allows for the expansion of an array-like object into individual elements.

**Pros and cons of each approach:**

* **Array.prototype.concat():**
	+ Pros:
		- Widely supported and well-documented
		- Easy to read and understand
	+ Cons:
		- Can be slower than the spread operator due to its method invocation overhead
		- May incur additional memory allocations
* **Spread operator (`...`):**
	+ Pros:
		- Faster execution compared to `concat()`
		- More concise and expressive code
	+ Cons:
		- Requires ES6 support, which may not be available in older browsers or environments
		- Can be less readable for developers unfamiliar with the syntax

**Library usage:**

There is no library mentioned in the provided JSON. The tests are self-contained JavaScript code snippets.

**Special JS feature or syntax:**

The tests use the spread operator (`...`), which was introduced in ES6. This allows for a concise and expressive way to concatenate arrays, but may not be supported in older browsers or environments.

**Benchmark preparation code and HTML Preparation Code:**

No specific preparation code is provided for the benchmark, as it's likely that the test cases are already optimized for performance. The `Html Preparation Code` field is also empty, which suggests that no additional setup or configuration is required for the tests.

**Other alternatives:**

If the spread operator is not supported in older browsers or environments, other alternatives can be used to concatenate arrays, such as:

* Using a library like Lodash, which provides a `concat` function
* Using the `Array.prototype.push()` method with the `...` spread operator
* Creating a new array using `Array.from()` and then pushing elements onto it

Keep in mind that these alternatives may introduce additional overhead or complexity compared to the original spread operator approach.

Related benchmarks:

Array.prototype.concat vs spread operator no jquery 83e48 (version: 0)

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

Comparing performance of: Array.prototype.concat vs spread operator

Created: 3 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 2 months ago):