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

Benchmark Definition

The benchmark is comparing three different approaches to iterate over an array of elements:

1. Native forEach: Using the native JavaScript forEach method, which calls a callback function for each element in the array.
2. jQuery .each: Using the jQuery library's .each method, which also iterates over an array of elements and calls a callback function for each one.
3. ECMAScript 2015 (ES6) for-of loop: Using the new for-of loop syntax introduced in ECMAScript 2015, which allows iterating directly over arrays without using forEach or indexing.

Pros and Cons of Each Approach

1. Native forEach:
   • Pros: Efficient and easy to use.
   • Cons: May not be as efficient as other methods on modern browsers, since it uses a callback function that can lead to slower execution.
2. jQuery .each:
   • Pros: Widely supported by older browsers, including Internet Explorer, due to jQuery's polyfills.
   • Cons: Adds unnecessary overhead due to the use of jQuery and its event loop, which can slow down performance.
3. ECMAScript 2015 (ES6) for-of loop:
   • Pros: Modern browsers support this syntax natively, making it efficient and easy to use.
   • Cons: May not work in older browsers that don't support ECMAScript 2015.

Library and Syntax

The benchmark uses jQuery for the .each method. The forEach method is native JavaScript, while the for-of loop is a modern syntax introduced in ECMAScript 2015.

Special JS Feature or Syntax

None of these examples use any special JavaScript features or syntax beyond what's already mentioned.

Other Alternatives

If you want to test other iteration methods, here are some alternatives:

• Array.prototype.reduce()
• Array.prototype.map()
• Array.prototype.filter()

For example, you could add a fourth test case using the reduce method:

"Benchmark Definition": "var sum = 0;\r\nlinkEls.forEach(function(el) {\r\n  sum += parseInt(el.href);\r\n});\r\nconsole.log(sum);"

This would compare the performance of the forEach, .each, and for-of loops to the reduce method.