bug#69140: 30.0.50; [elpa/vertico] Emacs with vertico-mode freezes if font is too big

[Po Lu]

Eli Zaretskii <eliz@gnu.org> writes:

>> with (set-face-attribute 'default nil :family "monospace" :height 440)
>> the result is the following:
>> 
>> --8<---------------cut here---------------start------------->8---
>> (list (window-height) (window-width)) => (13 53)
>> 
>> C-u C-x = (what-cursor-position) =>
>> 
>> display: by this font (glyph code):
>> ftcrhb:-    -Go Mono-regular-normal-normal-*-58-*-*-*-m-0-iso10646-1 (#x37)
>> --8<---------------cut here---------------end--------------->8---
>> 
>> I think this is still a reasonable size. I usually have my font height
>> set to 240, and recently I noticed that vertico was starting to lag at
>> this setting. Researching further, I found that the larger the font, the
>> more obvious the hang, and I also found the commit after which it all
>> started. I think that there is a bug here, but we need to investigate it
>> further and check it without pgtk on X.
>
> Could someone please reproduce and investigate?  Po Lu, any
> suggestions or ideas?

Alexandr, please send me an archive containing the font files for "Go
Mono", and I'll try to reproduce.