[ietf-dkim] 1193 considered harmful

[Arvel Hathcock]

 > 3) +   can hash a body once for redistribution; a fairly marginal
 >        feature that might help mass mailers, but Moore's law is just
 >        as likely to help, um, more.

For mailing lists which sign their outbound traffic surely this benefit 
is more than marginal; especially for large lists?  I don't have as much 
knowledge here as Mike and I'm no crypto expert (thank God for OpenSSL 
BTW) but isn't the hashing part what takes the longest (sorry if I'm 
wrong on that).

-- 
Arvel