Benchmark: Rest vs. Arguments to Array

Script Preparation code:

function rest(...args) {
  return function(fn) {
    return args.map(fn);
  };
}

function argsToArray() {
  const len = arguments.length;
  const args = Array(len);
  for (let i = 0; i < len; i++) {
    args[i] = arguments[i];
  }
  return function(fn) {
    return args.map(fn);
  };
}

Tests:

rest with 10 args
rest(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)(n => 2 * n);
rest with 1 arg
rest(1)(n => 2 * n);
argsToArray with 10 args
argsToArray(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)(n => 2 * n);
argsToArray with 1 arg
argsToArray(1)(n => 2 * n);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
rest with 10 args
rest with 1 arg
argsToArray with 10 args
argsToArray with 1 arg

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 11 months ago)

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Mobile Safari/537.36

Browser/OS: Chrome Mobile 140 on Android

View result in a separate tab

rest with 1 arg

4.0M/s

argsToArray with 1 arg

3.0M/s

rest with 10 args

1.7M/s

argsToArray with 10 args

992K/s

View exact numbers

Test name	Executions per second
✓ rest with 1 arg	3,989,008 Ops/sec
argsToArray with 1 arg	3,006,183 Ops/sec
rest with 10 args	1,706,484 Ops/sec
argsToArray with 10 args	992,269 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested, the options being compared, their pros and cons, and other considerations.

**Benchmark Definition:**
The benchmark measures the performance difference between two approaches for handling function arguments in JavaScript:

1. **Rest syntax (`...args`)**: This approach uses an array of arguments and maps each argument to a value using the provided function.
2. **Converting arguments to an array**: This approach converts the arguments passed to a function into an array, which is then mapped to values.

**Script Preparation Code:**
The script preparation code defines two functions:

* `rest`: Returns a function that takes another function `fn` as an argument. The returned function maps each argument in the rest parameter `args` to a value using `fn`.
* `argsToArray`: Converts the arguments passed to a function into an array, which is then mapped to values.

**Individual Test Cases:**
The benchmark defines four test cases:

1. `rest(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)(n => 2 * n)`: Tests the rest syntax with 10 arguments.
2. `rest(1)(n => 2 * n)`: Tests the rest syntax with only 1 argument.
3. `argsToArray(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)(n => 2 * n)`: Tests converting arguments to an array with 10 arguments.
4. `argsToArray(1)(n => 2 * n)`: Tests converting arguments to an array with only 1 argument.

**Library and Special Features:**
None of the provided test cases use any libraries or special JavaScript features beyond standard ECMAScript syntax.

**Options Compared:**

* **Rest syntax (`...args`) vs. Converting arguments to an array**: The benchmark compares the performance difference between these two approaches for handling function arguments.
	+ Pros of rest syntax:
		- More concise and readable code
		- Allows for easy addition or removal of arguments without modifying the function signature
	+ Cons of rest syntax:
		- May incur overhead due to array creation and manipulation
		- Limited support in older browsers (prior to ECMAScript 2015)
	+ Pros of converting arguments to an array:
		- Can provide more control over argument handling
		- May be more efficient for certain use cases
	+ Cons of converting arguments to an array:
		- More verbose code compared to rest syntax
		- May require additional memory allocation and copying

**Other Considerations:**

* The benchmark focuses on the performance difference between these two approaches, but it's essential to consider other factors like readability, maintainability, and browser support when choosing a method.
* The use of modern JavaScript features (e.g., rest syntax) may result in varying performance across different browsers and versions.

**Alternatives:**

* Other methods for handling function arguments include:
	+ Using an array or object as the first argument
	+ Utilizing a library like Ramda or Lodash for functional programming approaches
	+ Implementing custom argument handling using closures or higher-order functions

Keep in mind that this is not an exhaustive list, and other factors may influence your choice of method depending on your specific use case.

Rest vs. Arguments to Array (version: 0)

Using the rest syntax (...args) versus converting arguments to an array.

Comparing performance of: `rest with 10 args vs rest with 1 arg vs argsToArray with 10 args vs argsToArray with 1 arg`

Created: 8 years ago by: Guest

Go to the latest result

rest with 10 args

rest with 1 arg

argsToArray with 10 args

argsToArray with 1 arg

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Rest vs. Arguments to Array (version: 0)

Using the rest syntax (...args) versus converting arguments to an array.

Comparing performance of: rest with 10 args vs rest with 1 arg vs argsToArray with 10 args vs argsToArray with 1 arg

Created: 8 years ago by: Guest

Go to the latest result

rest with 10 args

rest with 1 arg

argsToArray with 10 args

argsToArray with 1 arg

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `rest with 10 args vs rest with 1 arg vs argsToArray with 10 args vs argsToArray with 1 arg`