bug#20445: excessive redisplay / echo area resizing during byte-compilation

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Date: Tue, 28 Apr 2015 23:21:16 -0400
> Cc: 20445@debbugs.gnu.org
> 
> Why not just do:
> 
>      (when byte-compile--interactive
>        (apply #'message format args))

This stops the flickering, but doesn't show any echo-area messages at
all.  Is that the intent?

Also, there's a related issue: why should
"M-x byte-compile-file RET" behave differently than
"M-x emacs-lisp-byte-compile RET" wrt to messages displayed in the
echo area?