Hi again!

We benchmarked the prototype in its current form to estimate the overhead
that the trace capture adds when an exception is thrown.

It seems that it slows down a lot, so we edited the paper and now it
proposed to regulate the stacktrace capture with the runtime option `
std::this_thread::capture_stacktraces_at_throw`, which is disabled by
default.

New version of proposal with full motivation can be found here -
https://htmlpreview.github.io/?https://github.com/axolm/libsfe/blob/master/paper/stacktrace_from_exception.html

What do you think about this?