bug#42190: 27.0.91; flex matching is slow

[Lars Ingebrigtsen]

Ivan Yonchovski <yyoncho@gmail.com> writes:

> To reproduce the issue, install company-mode, go scratch buffer
> execute the code:
>
> (company-mode 1)
> (setq completion-styles '(basic flex)
>       company-idle-delay 0)
>
> type
>
> (rrrrrr) and then start deleting from the last r to the first one.
>
> Observerd behaviour: the completion lags/feels slugish even in the
> emacs -q setup(it gets slower if you load several packages).

(I'm going through old bug reports that unfortunately weren't resolved
at the time.)

I seem to vaguely recall there being some improvements to flex
completion lately -- do you still see this problem in Emacs 29?

-- 
(domestic pets only, the antidote for overdose, milk.)
   bloggy blog: http://lars.ingebrigtsen.no