[ietf-dkim] DKIM performance metrics studies?

Folks,

As I recall, there have been a few studies done on the overhead of running 
DKIM.  Unfortunately I don't remember where the documents are that describes 
these.
I'd like to add them to the dkim.org site.  So any pointers would be 
appreciated.

Thanks.

d/
--

  Dave Crocker
  Brandenburg InternetWorking
  bbiw.net
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