Re: Slow completion-at-point was Re: Navigating completions from minibuffer

[Dmitry Gutov]

On 09/11/2023 00:11, T.V Raman wrote:
> Here is some timing information for this issue:
>
>
>
> I added the following around advice fragment to completion-at-point debug:
>
> (let ((start (current-time)))
>       ad-do-it
>       (message "<%.4f %d gcs %.4f>"
>                (float-time (time-subtract (current-time) start))
>                gcs-done gc-elapsed))
>
> Then I went to a shell buffer, and from my home directory (it contains
> a subdir text) typed
>
> cd te <tab>
>
> Messages buffer shows the following:
>
> ~/
> Making completion list...
> Sole completion
> <2.0219 14 gcs 1.2927>

Is completion-at-point slow for you in shell buffers in particular, or 
everywhere else too? E.g. completion in 'C-h f'.

There was a change last week (dfffb91a70532ac002), but it was supposed 
to make completion faster. And in your tests, it did (at least for 
icomplete, which knows how to take advantage of the optimization).