Re: Suppressing occasional failures in copy2 regression test

David Fetter <david@fetter.org> writes:
> * It's going to a lot of trouble to allow for the possibility of both
>   unordered results and of duplicate lines.  If we disallow duplicate
>   lines in unordered result sets, we can get a big speed gain by using
>   hash-based comparisons.

Why not just sort the lines and compare?
        regards, tom lane