ASP.NET Core documentation

ASP.NET documentation

Learn to use ASP.NET Core to create web apps and services that are fast, secure, cross-platform, and cloud-based. Browse tutorials, sample code, fundamentals, API reference and more. 

Ver particularmente la documentación contenida en "Advanced":

Basic JSON APIs with Route-to-code in ASP.NET Core

Request and response operations in ASP.NET Core

URL Rewriting Middleware in ASP.NET Core

File Providers in ASP.NET Core

Request Features in ASP.NET Core

Detect changes with change tokens in ASP.NET Core

Background tasks with hosted services in ASP.NET Core

Use hosting startup assemblies in ASP.NET Core

High-performance logging with LoggerMessage in ASP.NET Core

Develop ASP.NET Core apps using a file watcher

También la parte de "Performance":

ASP.NET Core Performance Best Practices