bug#42190: 27.0.91; flex matching is slow

bug#42190: 27.0.91; flex matching is slow

[Ivan Yonchovski]

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).

The main offenders are:
completion-flex-all-completions + GC - on CPU profiler  
completion-pcm--hilit-commonality - on Memory profiler

Thanks,
Ivan

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

bug#42190: 27.0.91; flex matching is slow

[Lars Ingebrigtsen]

Lars Ingebrigtsen <larsi@gnus.org> writes:

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

More information was requested, but no response was given within a
month, so I'm closing this bug report.  If the problem still exists,
please respond to this email and we'll reopen the bug report.

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