Let's break down the provided benchmark test cases.

Benchmark Definition JSON

The provided benchmark definition is a JSON object that describes the two benchmark tests:

1. Native sort of objects by localeCompare: This test compares the performance of native JavaScript's localeCompare method to compare two strings (in this case, user names). The localeCompare method is used to determine the sorting order of objects based on their property values.
2. Lodash _.orderBy: This test compares the performance of the Lodash library's _orderBy function, which sorts an array of objects based on a specified key and sorting order.

Script Preparation Code

The script preparation code is a JavaScript snippet that creates an array of objects with user properties:

var users = [
  { 'user': 'joey',  'age': 32 },
  { 'user': 'ross',    'age': 41 },
  { 'user': 'chandler', 'age': 39 }
];

This array will be used as the input for both benchmark tests.

HTML Preparation Code

The HTML preparation code includes a script tag that loads the Lodash library:

<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Lodash is a utility library that provides various functions for tasks such as string manipulation, array operations, and more.

Individual Test Cases

The two individual test cases are:

1. Native sort of objects by localeCompare: This test uses the localeCompare method to compare the user properties of the input array:

users.sort((a,b) => a.user.localeCompare(b.user));

2. Lodash _.orderBy: This test uses the Lodash _orderBy function to sort the input array based on the user property:

_.orderBy(users, 'user', 'asc');

Options Compared

The two tests compare the performance of:

1. Native JavaScript's localeCompare method for sorting objects by a string property.
2. Lodash's _orderBy function for sorting an array of objects based on a specified key.

Pros and Cons

Here are some pros and cons of each approach:

• Native localeCompare: Pros:
  • Fast and efficient, as it leverages the browser's built-in string comparison functionality.
  • Easy to implement and maintain.
• Cons:
  • Limited control over the sorting order (it's based on the locale setting).
  • May not work correctly for non-English characters or special cases.
• Lodash _.orderBy: Pros:
  • Provides more control over the sorting order, allowing for custom locale settings and special cases.
  • Supports sorting by multiple keys.
• Cons:
  • Requires loading an external library (Lodash).
  • May be slower than native implementation due to overhead of function call.

Library and Syntax

The Lodash library is a utility library that provides various functions for tasks such as string manipulation, array operations, and more. In this benchmark, the _orderBy function is used to sort an array of objects based on a specified key.

There are no special JavaScript features or syntaxes being tested in this benchmark.