This is a crosspost from the flamegraph repo: flamegraph-rs/flamegraph#192

Right now flamegraph uses dtrace on macOS but this runs into some limitations:

Inline frames are not properly handled (flamegraph-rs/flamegraph#113)
Running dtrace requires root rights
dtrace is generally considered deprecated functionality on macOS and will likely disappear longer term
One potential solution is to switch to xctrace and then implement a reader for the .trace / .run files. speedscope appears to have partial support for these files but I haven't been able to make it work at all yet. There is an issue from a while ago that it's not working (jlfwong/speedscope#196) but the code there might still be useful.

Although not familiar with the codebase I'd be ready to give it a go, but would it falls into the scope of inferno or do you not want to support an additional profiler?