use Inferno to generate flamegraphs

[andjo403]

closes #42

[bjorn3]

Keeping the ability to get the raw stack collapsed data is useful. You for example need them to create differential flamegraphs. It is also useful as input for other programs.

[andjo403]

shall I add a new crate toolsLib or something like that? and move the measureme/flamegraph/src/stack_collapse.rs there (later maybe also measureme/src/profiling_data.rs can be moved there) and then create the new flamegraph crate.

[michaelwoerister]

This looks awesome, thanks @andjo403!

[wesleywiser]

@andjo403 Yeah, I think I gave you bad advice on Zulip. Sorry about that!

I agree with @bjorn3 that stack_collapse is useful by itself so we shouldn't remove it.

create the new flamegraph crate

I think this is the best thing to do. Adding a new crate to the workspace will also let you reuse code from stack_collapse inside it since we shouldn't duplicate that logic.

Edit: By the way, I just want to say this looks awesome and I'm really excited to see it land! 🎉

[andjo403]

crated the new crates tools_lib and flamegraph

[wesleywiser]

This looks great!