Benchmark: Looping Mechanisms

Script Preparation code:

var xs = [];

for (var i = 0; i < 100000; i++)
  xs.push(i);

Tests:

Simple for loop
var doubles = []; for (x of xs) doubles.push(x * 2);
Map
var doubles = xs.map(x => x * 2)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Simple for loop
Map

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks.

**Benchmark Definition**
The benchmark is titled "Looping Mechanisms" and has two test cases: "Simple for loop" and "Map". The script preparation code is similar, creating an array `xs` with 100,000 elements using a traditional for loop. The main difference between the two test cases lies in how the array is processed.

**Options Compared**
The benchmark compares two looping mechanisms:

1. **Simple For Loop**: A traditional for loop is used to iterate over the array and push each element multiplied by 2 into another array `doubles`.
2. **Map Function**: The `map` function is used to create a new array `doubles` containing the elements of `xs` multiplied by 2.

**Pros and Cons**

1. **Simple For Loop**
	* Pros:
		+ Easy to understand and implement.
		+ Allows for direct access to array elements using indexing.
	* Cons:
		+ Can be slower than other methods due to the overhead of incrementing a loop counter.
		+ May not be suitable for large arrays or complex operations.
2. **Map Function**
	* Pros:
		+ More concise and expressive than traditional for loops.
		+ Allows for more functional programming-style operations.
	* Cons:
		+ Can be slower due to the overhead of function calls and array indexing.
		+ May not be suitable for very large arrays or complex operations.

**Library and Purpose**
In this benchmark, the `map` function is used. The `map` function takes a callback function as an argument, which is applied to each element in the original array. In this case, the callback function multiplies each element by 2.

**Special JS Feature or Syntax**
The benchmark uses JavaScript's array iteration methods, such as `for...of`, but it does not require any special JavaScript features or syntax beyond what is commonly used in modern JavaScript development.

**Other Alternatives**
There are other looping mechanisms available in JavaScript, including:

1. **forEach**: A method that calls a provided function once for each element in an array.
2. **Reduce**: A method that applies a reducer function to all elements of an array and returns a single value.
3. **Filter**: A method that creates a new array with all elements that pass the test implemented by a provided function.

These alternatives may be suitable in different situations, such as when working with large datasets or complex operations.

**Benchmark Preparation Code**
The script preparation code is:
```javascript
var xs = [];
for (var i = 0; i < 100000; i++) {
  xs.push(i);
}
```
This code creates an array `xs` with 100,000 elements using a traditional for loop.

Latest run results:

Run details: (Test run date: 8 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Browser/OS: Chrome 53 on Mac OS X 10.11.6

View result in a separate tab

Test name	Executions per second
Simple for loop	19.8 Ops/sec
Map	62.4 Ops/sec

Related benchmarks:

Looping Mechanisms (version: 0)

Comparing performance of: Simple for loop vs Map

Created: 8 years ago by: Registered User

Jump to the latest result

Simple for loop

Map

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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