From: Junio C Hamano <gitster@pobox.com>
Date: Tue, 12 Jul 2011 17:43:12 GMT
Subject: Re: [RFC/PATCH 0/3] teach --histogram to diff
Message-ID: <7vfwmb8ken.fsf@alter.siamese.dyndns.org>
In-Reply-To: <CAJo=hJu5ubkzUyyPM0nqP+J9CU3hBtAHfuzaLSuN214Hux4qTA@mail.gmail.com>

Shawn Pearce <spearce@spearce.org> writes:

> Have you looked at a patch that differs in output between Myers and
> patience, and then compared those to the histogram version?

$ git log -p v1.6.6..v1.7.6 | git patch-id >/var/tmp/md
$ git log --histogram -p v1.6.6..v1.7.6 | git patch-id >/var/tmp/hd
$ diff -u0 /var/tmp/md /var/tmp/hd |
  sed -ne '/^+/s/^+[0-9a-f][0-9a-f][0-9a-f]* //p' |
  while read commit
  do
  	git show "$commit" >/var/tmp/1
        git show --histogram "$commit" >/var/tmp/2
        interdiff /var/tmp/1 /var/tmp/2
  done

shows there is one that gives vastly different appearance, but it all
boils down to which lines to take as common, and for this particular
example neither is more readable over the other (9560808f2ef5a34d2a).

Running the above "show" with larger -U$n value shows there don't seem to
be any discrepancies between the two.