fast-import: multiple processes possible?

Hi, I have a user question, I hope that's ok.  Actually, the end goal is
development of a fast-import frontend.  The fast-import manpage says
that it is safe to run "any other" git operation concurrently with
fast-import.  It doesn't say if it is possible and safe to run another
copy of fast-import itself.

The reason I'd like to do this is speedup.  With sequential approach my
frontend can only load each core on my system about 50%.  If I could run
multiple imports concurrently I could make it close to 100%, especially
when feeding it blobs (which take most of the time).

Thanks for the advice.

-- 
Ian Zimmerman [off-list ref]
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