It can be challenging or even overwhelming to prepare for a job interview or project meeting. The number of subjects you need to be familiar with as a developer is staggering. Mastering the fundamentals of the platform you're developing software for should always be a key focus area. That is why a significant portion of the content published on Cocoacasts focuses on the fundamentals of Swift and Cocoa development.
Even though threading and concurrency are more advanced concepts, you need to understand the basics regardless of your level of experience. The devices we develop applications for are powered by multicore processors and it's important to take advantage of that power.
In the previous episode, we drastically improved the performance and usability of the application. It no longer takes several seconds for the application to become responsive. Even though the application's performance has gotten better, there's room for improvement.