node --prof is not giving me useful results

Hi all,

As I'm new to Neon this might be a case of "you're holding it wrong", but it seems that doing node --prof on an application that makes heavy use of a Neon addon, gives rather useless results, with almost all ticks being in UNKNOWN or __syscall_cancel_arch_end.

Perhaps worth noting that for this particular application, https://github.com/vanviegen/warpsocket/, JavaScript code runs mostly as callbacks from Rust code.

Is this indeed an issue, or am I doing something wrong, or is there some other way to do profiling for Neon?

Thanks! Frank