9 was a pretty arbitrary number, but here's a somewhat standard use-case
for 5: git rebase --onto (
http://git-scm.com/book/en/Git-Branching-Rebasing#More-Interesting-Rebases)
 It involves 5 files: branch A, common ancestor of A and branch C, branch
B, common ancestor of branch B and branch C, and the result of the merge




On Fri, Nov 1, 2013 at 7:50 AM, ZyX <[email protected]> wrote:

> > I recompiled vim with a DB_COUNT of 5, and that successfully worked to
> > diff five files.  I suspect that the DB_COUNT limit can be raised
> > without difficulty.  I suspect that with a bit of coding that the
> > DB_COUNT could be made arbitrary (ie. dependent upon how many files are
> > being requested for simultaneous diffing).
>
> Absence of limit makes sense. Both 9 and 4 look like some magic number. 4
> was questioned by OP, I just added a question for 9.
>
> I do not think though somebody is going to bother with memory
> (de)allocation implied by removing the limit. But before increasing limit
> to 9, 99 or INT_MAX one has to answer why. I do not see much difference
> between 4 and 9: I never actually needed more then 3; and even 3 diffed
> buffers are a bit confusing. Thus I would like to hear a use-case that
> resulted in request to increase the limit.
>
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