bug#29279: Sharing the margins

[Dmitry Gutov]

On 11/15/17 10:03 PM, Eli Zaretskii wrote:

> > I intend to drop most calls of 'window-configuration-change-hook' and
> > replace them by 'window-size-change-functions' if all they do is to
> > change the sizes of windows only.
>
> Regardless of the reasons for this change, it doesn't affect the issue
> at hand: calling window-size-change-functions from inside redisplay
> has the same issues as calling window-configuration-change-hook.

But margin size changes won't have to call window-size-change-functions, 
right? Then it might be possible to move all the heavy consumers to this 
hook, leaving window-configuration-change-hook relatively lightweight 
(right)?