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Re: [PATCH 3/3] ref-filter: avoid backend filtering with --ignore-case

On Mon, Jul 2, 2018 at 5:12 PM Jeff King <peff@xxxxxxxx> wrote:
> When for-each-ref is used with --ignore-case, we expect
> match_name_as_path() to do a case-insensitive match. But
> there's an extra layer of filtering that happens before we
> even get there. Since commit cfe004a5a9 (ref-filter: limit
> traversal to prefix, 2017-05-22), we feed the prefix to the
> ref backend so that it can optimize the ref iteration.
> There's no mechanism for us to tell the backend we're
> matching case-insensitively. And nor is there likely to be

Perhaps: s/And nor/nor/

> one anytime soon, since the packed backend relies on
> binary-searching the sorted list of refs. Let's just punt on
> this case. The extra filtering is an optimization that we
> simply can't do. We'll still give the correct answer via the
> filtering in match_name_as_path().
> Signed-off-by: Jeff King <peff@xxxxxxxx>