Benchmark: FOOOOOOOOOOO - MeasureThat.net

Script Preparation code:

   var arr = [];
    for (var i = 0; i < 1000; i++) {
      arr[i] = i;
    }
  
    function someFn(i) {
      return i * 3 * 8;
    }

Tests:

foreach
arr.forEach(function (item){ someFn(item); })
for
for (let i = 0; i < arr.length; i++) { someFn(arr[i]); }
map
arr.map(item => someFn(item))

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
foreach
for
map

Fastest: N/A

Slowest: N/A

Latest 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 what is being tested in this benchmark and explore the different approaches.

**Benchmark Definition**

The benchmark definition specifies three tests:

1. `foreach`: This test iterates over an array using the `forEach` method, calling the `someFn` function for each item in the array.
2. `for`: This test iterates over an array using a traditional `for` loop, calling the `someFn` function for each item in the array.
3. `map`: This test applies a transformation to an array using the `map` method, calling the `someFn` function for each item in the transformed array.

**Script Preparation Code**

The script preparation code defines two variables:

* `arr`: An empty array initialized with 1000 elements, populated with numbers from 0 to 999.
* `someFn`: A function that takes an integer as input and returns the result of multiplying it by 3 and 8.

**Options Compared**

The three tests compare different approaches to iterating over an array and applying a transformation:

1. `forEach`: This approach uses the `forEach` method, which calls the provided callback function for each item in the array.
2. `for`: This approach uses a traditional `for` loop to iterate over the array elements.
3. `map`: This approach uses the `map` method to apply a transformation to the array.

**Pros and Cons of Each Approach**

Here are some pros and cons of each approach:

* `forEach`:
	+ Pros: Convenient, easy to read, and concise syntax.
	+ Cons: May have performance overhead due to callback function invocation.
* `for`:
	+ Pros: Can be more efficient than `forEach` since it avoids callback function invocation.
	+ Cons: Requires explicit indexing and loop control logic.
* `map`:
	+ Pros: Concise, expressive syntax for transformations.
	+ Cons: May have performance overhead due to creation of new arrays.

**Library Used**

The `someFn` function is not part of a specific library. It's a simple arithmetic function that takes an integer as input and returns the result of multiplying it by 3 and 8.

**Special JS Features or Syntax**

None of the tests explicitly use special JavaScript features or syntax, such as async/await, Promise, or decorators.

**Alternative Approaches**

There are other approaches to iterating over arrays and applying transformations, such as:

* Using `reduce` method: Instead of using `forEach`, `for`, or `map`, you can use the `reduce` method to accumulate values in an array.
* Using `filter` method: Instead of using `forEach` or `map`, you can use the `filter` method to create a new array with filtered elements.
* Using `iterators`: You can use iterators, such as `Array.prototype.entries()`, to iterate over arrays and access both index and value.

Keep in mind that these alternative approaches might have different performance characteristics or syntax requirements compared to the tests in this benchmark.

Related benchmarks:

FOOOOOOOOOOO (version: 0)

Comparing performance of: foreach vs for vs map

Created: 5 years ago by: Guest

Jump to the latest result

foreach

for

map

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):