Possibility to filter certain files or classes?

[Qqwy]

We'd like to use Stackprof to generate flamegraphs for the requests of some of our Rails servers.

Some servers run on Passenger, others on Puma.

In both cases, current flamegraphs show that normal execution of the code is frequently interrupted by an event loop call, such as PhusionPassenger::RequestHandler#wait_until_termination_requested.

These chop the flamegraph into many smaller pieces, making it often difficult to see the 'normal' call flow.

Stackprof already has support to hide garbage collection from its flamegraph (which results in similar 'chopping' behaviour). Might it be possible to filter Stackprof's output on certain filenames or class/method names as well?