Benchmark: arguments vs array

Script Preparation code:

function arr( args ) {
  var result = 0;
  for (var i = 0 ; i < args.length ; i++ )
    result += args[i];
  
  return result;
}

function args( ) {
  var result = 0;
  for (var i = 0 ; i < arguments.length ; i++ )
    result += arguments[i];
  
  return result;
}

Tests:

array
var total = arr([1,2,3,4,5,6,7,8,9]);
args
var total = args(1,2,3,4,5,6,7,8,9);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array
args

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/136.0.0.0 Safari/537.36

Browser/OS: Chrome 136 on Windows

View result in a separate tab

Test name	Executions per second
array	40091116.0 Ops/sec
args	30551076.0 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 benchmark and its test cases.

**Benchmark Overview**

The benchmark measures the performance difference between two approaches to summing an array of numbers: using an array (`arr` function) versus using arguments (`args` function).

**Options Compared**

Two options are compared:

1. **Array (arr)**: This approach uses a traditional array with `length` property and indexing (`args[i]`) to access elements.
2. **Arguments (args)**: This approach uses the `arguments` object, which is an array-like object containing the function's arguments as properties.

**Pros and Cons**

* **Array (arr)**
	+ Pros:
		- Can be more intuitive for developers familiar with traditional arrays.
		- May be faster due to less overhead compared to using arguments.
	+ Cons:
		- Requires explicit indexing, which can lead to errors if not done correctly.
		- May require additional memory allocation for the array.
* **Arguments (args)**
	+ Pros:
		- Simplifies code by eliminating the need for explicit indexing.
		- Can be more efficient due to reduced overhead compared to traditional arrays.
	+ Cons:
		- May lead to performance issues if not handled correctly, as it relies on a specific order of arguments.
		- Less intuitive for developers unfamiliar with arguments.

**Library and Purpose**

In the provided benchmark code, there is no explicit library used. However, in general, libraries like Lodash or other utility functions can be used to simplify array operations and make them more efficient.

**Special JS Feature or Syntax (none)**

There are no special JavaScript features or syntaxes mentioned in this benchmark.

**Other Alternatives**

Some alternative approaches to summing an array of numbers include:

1. **Using `reduce()`**: This method uses a callback function to reduce the array elements to a single value.
2. **Using `forEach()` and accumulator**: This approach iterates over the array using `forEach()`, accumulating the values in a variable.

These alternatives might be used in different scenarios or for specific use cases, but they are not relevant to this particular benchmark.

I hope this explanation helps! Let me know if you have any further questions.

Related benchmarks:

arguments vs array (version: 0)

Comparing performance of: array vs args

Created: 9 years ago by: Guest

Jump to the latest result

array

args

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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