Benchmark: Array.map() Anonymous Function VS Variable Function VS Named Function

Script Preparation code:

const ARR_LENGTH = 1000;

var arr = new Array(ARR_LENGTH);
for(let i = 0; i < ARR_LENGTH-1; i++) arr[i] = i;

var add = v => v+1;

function ADD(v){
	return v + 1;
}

Tests:

Anonymous Function
arr.map(v => v+1)
var Function
arr.map(add)
Named function
arr.map(ADD)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Anonymous Function
var Function
Named function

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):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and analyze what's being tested.

**Benchmark Overview**

The benchmark compares three different approaches for calling the `map()` function on an array: an anonymous function, a variable function, and a named function.

**Script Preparation Code**

The script preparation code creates an array `arr` with 1000 elements, where each element is initialized to its index. It then defines two functions:

1. `add(v)`: an anonymous function that takes a value `v` and returns `v + 1`.
2. `ADD(v)`: a named function that also takes a value `v` and returns `v + 1`.

**Html Preparation Code**

There is no HTML preparation code provided, so we can assume that the benchmark only tests the JavaScript execution.

**Test Cases**

The benchmark consists of three individual test cases:

1. **Anonymous Function**: Calls `arr.map(v => v+1)`, which applies the anonymous function to each element in the array.
2. **Variable Function**: Calls `arr.map(add)`, which applies the variable function to each element in the array.
3. **Named Function**: Calls `arr.map(ADD)`, which applies the named function to each element in the array.

**Library**

There is no explicit library mentioned, but the `map()` function is a built-in JavaScript method that works on arrays.

**Special JS Feature/Syntax**

None of the benchmark test cases use any special JavaScript features or syntax beyond the standard `map()` function and variable declarations.

**Pros and Cons of Each Approach**

Here's a brief analysis of each approach:

1. **Anonymous Function (v => v+1)**:
	* Pros: concise, easy to read, and efficient.
	* Cons: can be less readable for some developers, especially those who are not familiar with arrow functions.
2. **Variable Function (`var add = v => v+1`)**:
	* Pros: similar to anonymous function, but more explicit about the function declaration.
	* Cons: requires a separate `var` statement to declare the variable function, which can be less readable than an inline function declaration.
3. **Named Function (`function ADD(v){ return v + 1; }`)**:
	* Pros: easy to read and understand, especially for developers who are familiar with traditional function declarations.
	* Cons: requires more code to define the function, which can make it less concise than anonymous or variable functions.

**Other Alternatives**

If the `map()` function were not available or supported, alternative methods could be used, such as:

1. Using a loop and conditional statements (e.g., `arr.forEach(function(element) { ... }`) to iterate over the array.
2. Using a library like Lodash or Underscore.js that provides an implementation of `map()`.
3. Implementing a custom iterator using a `for...of` loop or a custom iterator function.

Keep in mind that these alternatives would likely have different performance characteristics and may not be as concise or readable as the original code.

Related benchmarks:

Array.map() Anonymous Function VS Variable Function VS Named Function (version: 0)

Comparing performance of: Anonymous Function vs var Function vs Named function

Created: 4 years ago by: Registered User

Jump to the latest result

Anonymous Function

var Function

Named function

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):