In this episode Jonathan is showing us how to leverage the new diagnostics tools that will be released with .NET Core 3. These tools can be installed as global .NET CLI tools on your machine and enable you to drill down into the CPU- and memory-consumption of your running .NET Core applications.
Another cool new feature that Jonathan demonstrates, is the ability to develop with VS Code inside a container. This is called “Remote Development” and it enables you to develop for different technology stacks without the need to install any SDK or framework on your host machine. Everything runs inside a container while the developer experience appears “local”. Although this is not the main topic of the video, it’s pretty cool stuff!