bug#65491: [PATCH] Improve performance allocating vectors

[Eli Zaretskii]

> From: Ihor Radchenko <yantar92@posteo.net>
> Cc: monnier@iro.umontreal.ca, 65491@debbugs.gnu.org
> Date: Sat, 26 Aug 2023 07:51:50 +0000
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> >> If you know any useful code that makes heavy use of vector allocation, I
> >> can also benchmark it.
> >
> > Look in the area of encoding/decoding and automatic compositions --
> > these tend to use vectors quite a lot.  For example, rendering text
> > that uses a script where most of characters are composed, such as
> > Arabic or Hangul (Korean) should allocate vectors.  Note that this is
> > the case where we call Lisp from C display code.
> 
> Do you mean something like scrolling performance when scrolling a large
> Arabic/Korean text file?

Yes.