Hi,

Yes, guile-email is quite slow. I think it is because it does multiple
passes of each email trying to split MIME entities and what not. For a
long time, I've been meaning to rewrite guile-email to only do a single
pass. It's quite a bit of work, but I'll try to finish it in a week.

Meanwhile, if you have any benchmarking scripts, do share those. It
would help me get a head start on the problem.

Thanks!