The document discusses new runtimes in OpenWhisk for supporting Go, Swift, and binary actions. Specifically: - A new ActionLoop runtime was created to efficiently support Go actions and be more performant than the Docker skeleton runtime. - The ActionLoop runtime was extended to support generic binaries, scripting languages like Bash and Haskell, and compiling Go and Swift actions from source code. - Images with the ActionLoop runtime can be used both to execute actions directly and to compile Go and Swift actions offline.