How the Go Runtime Works

The Go runtime is a system that manages goroutines, memory, and garbage collection, with behavior controllable via GODEBUG settings. You can override specific runtime behaviors by setting the GODEBUG environment variable or using //go:debug directives in your source code. For example, to disable HTTP/2 in the client and server, run your program with: GODEBUG=http2client=0,http2server=0 go run main.go

The Go runtime is the engine that runs your program, handling tasks like scheduling tasks and cleaning up memory. It includes a special system called GODEBUG that lets you tweak how this engine behaves, similar to changing settings in a car's dashboard. You use these settings when a new Go update breaks your old code or when you need to debug specific internal behaviors.