Benchmark: Best way to get all function arguments

Script Preparation code:

function get_with_slice() {
  return Array.prototype.slice.call(arguments)
}

function get_with_array_from() {
  return Array.from(arguments)
}

function get_with_spread(...args) {
  return args
}

Tests:

Array.slice
get_with_slice(1, 2, 3)
Array.from
get_with_array_from(1, 2, 3)
Spread
get_with_spread(1, 2, 3)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.slice
Array.from
Spread

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

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**Overview**

The provided JSON represents a JavaScript microbenchmark on the MeasureThat.net website. The benchmark compares three different approaches to get all function arguments: `Array.prototype.slice.call(arguments)`, `Array.from(arguments)`, and using the rest parameter syntax (`...args`).

**Benchmark Preparation Code**

The script preparation code is a simple JavaScript function that defines three functions:

* `get_with_slice`: uses `Array.prototype.slice.call(arguments)` to get all function arguments.
* `get_with_array_from`: uses `Array.from(arguments)` to get all function arguments.
* `get_with_spread`: uses the rest parameter syntax (`...args`) to get all function arguments.

**Options Compared**

The three options compared are:

1. `Array.prototype.slice.call(arguments)`: This method creates a new array from the arguments passed to the function, effectively "freezing" them so they can't be modified.
2. `Array.from(arguments)`: This method creates a new array from the arguments passed to the function, similar to `slice.call`, but with better performance and more modern syntax.
3. Using the rest parameter syntax (`...args`): This method simply returns an array containing all the arguments passed to the function.

**Pros and Cons**

* **Array.prototype.slice.call(arguments)**:
	+ Pros: widely supported across browsers, simple syntax.
	+ Cons: can be slower than other methods, creates a new array that needs to be garbage collected.
* **Array.from(arguments)**:
	+ Pros: faster performance, modern syntax, creates an array without the need for garbage collection.
	+ Cons: requires support for `Array.from` in older browsers (IE 11 and earlier).
* **Using the rest parameter syntax (`...args`)**:
	+ Pros: fastest performance, simple syntax, supports all modern browsers.
	+ Cons: may require additional setup or transpilation to work with older browsers.

**Library Used**

None of the options used a library. However, `Array.from` is a built-in method in modern JavaScript (ECMAScript 2015 and later).

**Special JS Feature/Syntax**

The rest parameter syntax (`...args`) was introduced in ECMAScript 2015 (ES6) and allows functions to accept variable arguments. This syntax is used by the third option compared.

**Other Alternatives**

If none of these options are suitable, other alternatives could be:

* Using a library like `lodash` or `underscore`, which provide various methods for working with arrays and function arguments.
* Using a different approach, such as using `JSON.stringify(arguments)` to convert the arguments to a string.
* Using a transpiler like Babel to support older browsers that don't understand modern JavaScript features.

**Benchmark Results**

The latest benchmark results show that:

* The rest parameter syntax (`...args`) is the fastest option compared.
* `Array.from(arguments)` is slightly slower than the rest parameter syntax, but still faster than `Array.prototype.slice.call(arguments)`.
* Both `Array.prototype.slice.call(arguments)` and `Array.from(arguments)` are slower than the rest parameter syntax due to the overhead of creating an array.

Related benchmarks:

Best way to get all function arguments (version: 0)

Comparing performance of: Array.slice vs Array.from vs Spread

Created: 4 years ago by: Guest

Jump to the latest result

Array.slice

Array.from

Spread

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):