Hands-On RESTful Web Services with ASP.NET Core 3

Services life cycle

A key point to master when we deal with dependency injection is the services life cycle. The services life cycle is an essential concept about performance, because a wrong service life cycle may cause complicated performance degradation.

The object lifetime in .NET is simple: the object is instantiated, used, and finally disposed of by the garbage collector. The dispose phase is the most relevant in terms of performance. In a dependency injection process, the consumer of a specific dependency does not control its lifetime. Indeed, dependencies are usually initialized by the dependency injection container, and they continue to exist until all their consumers hold them.

A typical performance issue that engineers face in ...