Benchmark: fijwejoajwef - MeasureThat.net

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 ]

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Test case name	Result
Array.prototype.concat
spread operator

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 microbenchmarks!

**What is tested?**

The provided benchmark tests two approaches to concatenate arrays in JavaScript:

1. **`Array.prototype.concat()`**: This method takes an array as an argument and returns a new array containing all elements from both the original array and the passed array.
2. **Spread operator (`...`)**: This syntax allows you to expand an array into separate arguments for a function or create a new array by spreading its elements.

**Options compared**

The benchmark compares the performance of these two approaches:

* `Array.prototype.concat()`: The traditional method for concatenating arrays in JavaScript.
* Spread operator (`...`): A newer, more concise way of achieving the same result using the spread syntax.

**Pros and Cons:**

1. **`Array.prototype.concat()`**:
	* Pros:
		+ Widely supported and well-documented.
		+ Can be used with other methods that expect arrays as arguments (e.g., `array.push()`, `array.splice()`).
	* Cons:
		+ Less concise than the spread operator syntax.
		+ Creates a new array, which can lead to performance issues for large datasets.
2. **Spread operator (`...`)**:
	* Pros:
		+ More concise and readable than `concat()`.
		+ Creates an entirely new array, which is more memory-efficient.
	* Cons:
		+ Less widely supported in older browsers or environments (e.g., Internet Explorer).
		+ May be less familiar to developers without recent exposure.

**Library usage**

In the benchmark definition JSON, there is no explicit mention of any libraries being used. However, the individual test cases use JavaScript syntax that has been part of the language since ES5 (2009).

**Special JS feature or syntax**

The spread operator (`...`) was introduced in ECMAScript 2015 (ES6) and allows you to expand arrays into separate arguments using the `...` syntax. This syntax is more concise and expressive than traditional methods like `concat()`.

**Other alternatives**

Before the introduction of the spread operator, other approaches were used for array concatenation, such as:

1. **Array.prototype.push()**: Adding elements to the end of an array using `push()` instead of `concat()`.
2. **Array.prototype.splice()**: Replacing or inserting elements in an array using `splice()`, which can be less efficient than `concat()`.

While these alternatives are still valid, they are generally considered less readable and more error-prone than the spread operator syntax.

In summary, the benchmark tests two popular approaches for concatenating arrays in JavaScript: `Array.prototype.concat()` and the spread operator (`...`). The spread operator offers a more concise and memory-efficient solution, but may not be supported by older browsers or environments.

Related benchmarks:

fijwejoajwef (version: 0)

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

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

Created: 4 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

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):