Re: [PATCH] xdiff: improve trimming preprocessing
- Date: Tue, 06 Mar 2018 11:29:44 -0800
- From: Junio C Hamano <gitster@xxxxxxxxx>
- Subject: Re: [PATCH] xdiff: improve trimming preprocessing
Eric Sunshine <sunshine@xxxxxxxxxxxxxx> writes:
> On Tue, Mar 6, 2018 at 6:53 AM, Jun Wu <quark@xxxxxx> wrote:
>> xdiff-interface trims common suffix if ctxlen is 0. Teach it to also
>> trim common prefix, and trim less lines if ctxlen > 0. So it can benefit
>> the default diff command, as seen by profiling: [...]
I vaguely recall that we have tried this in the distant past, found
that it produced incorrect result, and that is why we limit the
optimization for no-context case.
Does anybody have an archive reference?