bug#66288: 29.1; Performance regression using pipe for subprocess

[Dmitry Gutov]

On 02/10/2023 22:12, Gerd Möllmann wrote:
> Chris Hanson<cph@chris-hanson.org>  writes:
>
> FWIW, I can't reproduce the slowdown on macOS.  I get the
>
> > ;process time: 0 (0 RUN + 0 GC); real time: 1
> on the emacs-29 branch with emacs-29.1 and HEAD (same on master).

Curious: I reproduced it once (master, an older session), but then not 
anymore, all subsequent attempts look fine/instant.

That's with MIT Scheme 11.2, though (the output is a little different, 
chiefly the list of bindings at the top).