Overview

The provided benchmark definition and test cases are designed to compare the performance of three different ways to iterate over an array in JavaScript: Array.prototype.forEach, Lodash's _.each, and jQuery's $. Each test case uses a small array with three elements and increments a variable for each iteration.

What is being tested

The benchmark is testing the execution speed of these three methods:

1. Array.prototype.forEach: A built-in JavaScript method that iterates over an array, executing a provided callback function for each element.
2. Lodash's _.each: A utility function from the Lodash library that provides a functional way to iterate over arrays and objects.
3. jQuery's $.each`: A method from the jQuery library that allows iterating over arrays using a callback function.

Options compared

The options being compared are:

• Array.prototype.forEach
• Lodash's _.each
• jQuery's $.each

Pros and Cons of each approach:

1. Array.prototype.forEach:
   • Pros:
     • Built-in JavaScript method, no additional library required.
     • Simple to use and understand.
     • Provides a clear way to iterate over arrays with a callback function.
   • Cons:
     • May be slower than optimized libraries due to the overhead of the built-in method.
2. Lodash's _.each:
   • Pros:
     • Part of a widely used and well-maintained library (Lodash).
     • Provides additional features, such as support for arrays with multiple lengths.
     • Can be optimized for performance.
   • Cons:
     • Requires including an additional library.
3. jQuery's $.each`:
   • Pros:
     • Part of a widely used and well-maintained library (jQuery).
     • Provides additional features, such as support for arrays with multiple lengths.
     • Can be optimized for performance.
   • Cons:
     • Requires including an additional library.

Library usage

In the benchmark code, Lodash's _.each is used to iterate over the array. The $.each method from jQuery is also used, but it requires including the jQuery library in the HTML header.

Special JS feature or syntax

There are no special JavaScript features or syntaxes being tested in this benchmark. The focus is on comparing the performance of three different iteration methods.

Other alternatives

If not using Array.prototype.forEach, other alternatives for iterating over arrays could include:

• Using for loops
• Utilizing forEach-like methods from other libraries (e.g., Ramda)
• Implementing custom iteration logic

However, these alternatives are not included in the benchmark.