On 26 December 2016 at 23:27, Juri Linkov <juri@linkov.net> wrote:

[message cut]

Thanks, Juri, for helping again with this bug.

I attach an updated version of my patch, which uses an :options setting for
display-buffer-alist so that the current behaviour remains the default, and
runs a preoutput-filter-function which calls display-buffer only when
output is added to an empty buffer.

I believe this addresses the performance and behaviour issues, without the
need for another user option.

It is also rather shorter than the previous patch.

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