I'll do my best to explain the benchmark and its results.

Benchmark Overview

The benchmark measures the performance of two approaches for sorting an array of objects:

1. Using Lodash's sortBy function with a custom compare function.
2. Implementing a simple sorting algorithm using the Array.sort() method.

Lodash sortBy Approach

In this approach, the sortBy function is used to sort the arr array based on the order_by property of each object. The custom compare function is used to determine the order of two objects in the sorted array.

The Lodash sortBy function is a utility function that takes an array and a compare function as input. It returns a new sorted array based on the comparison function. In this case, the comparison function is simply returning the difference between the order_by values of two objects.

Array.sort() Approach

In this approach, the Array.sort() method is used to sort the arr array. The sorting algorithm used by the browser's JavaScript engine is not explicitly specified in the benchmark results. However, it is likely that the V8 JavaScript engine (used by Chrome) uses a variation of the merge sort or insertion sort algorithm.

Comparison

The two approaches have different performance characteristics:

• Lodash sortBy approach:
  • Pros: More flexible and customizable sorting order.
  • Cons: May have overhead due to the use of a separate library.
• Array.sort() approach:
  • Pros: Fast and lightweight, with minimal overhead.
  • Cons: Less flexible and customizable sorting order.

Device-Specific Optimizations

The benchmark results show that both approaches are executed at a high rate on Chrome 97 on desktop devices. However, the Lodash sortBy approach has slightly higher execution rates than the Array.sort() approach. It is likely that the browser's JavaScript engine has optimized the sorting algorithm for this specific use case.

Other Considerations

There are other factors to consider when evaluating the performance of these two approaches:

• Memory usage: The Lodash library may have a larger memory footprint than the built-in Array object.
• Code size: The Lodash sortBy function is typically larger and more complex than the simple sorting algorithm used by Array.sort().
• Compatibility: The Lodash library may not be compatible with older browsers or environments.

Alternatives

If you need to sort an array of objects, other alternatives include:

• Using a different JavaScript library, such as Moment.js for date sorting.
• Implementing a custom sorting algorithm using a language like C++ or Rust.
• Using a specialized sorting library, such as QuickSort or Merge Sort.