Instrument your application with tracing and get tree-structured summaries of your application activity with timing information on the console:

https://github.com/davidbarsky/tracing-tree/blob/483cc0a118c3170f4246d6fa4a9f018a00d8f0a9/examples/quiet.stdout#L1-L28

(Format inspired by slog-term)

After instrumenting your app with tracing, add this subscriber like this:

let subscriber = Registry::default().with(HierarchicalLayer::new(2));
tracing::subscriber::set_global_default(subscriber).unwrap();