Re: ccomplete#Complete very slow on large tags file

On Thu, Apr 2, 2020 at 9:09 AM Christian Brabandt <cblists@256bit.org> wrote:
>
> [I did not receive the original mail, so answering to Tonys mail, please
> keep the list on CC]
>
> On Mi, 01 Apr 2020, Tony Mechelynck wrote:
>
> > > Yes, the tags file is sorted and vim is built with +tag_binary and
> > > 'tagbsearch' is on. The tags file wasn't case-folded sorted, but I tried
> > > with that too and I see similar performance.
> > >
> > > Anyway, just to remove any potential confusion, jumping to tags via
> > > 'CTRL-]' is blazing fast. So is listing all alternatives with 'g]'. Does
> > > ccomplete use the same mechanism for searching tags file as those two?
> > > If so, then I wonder why it is so much slower.
>
> Hm, I had a quick look at ccomplete.vim. It not only does a tag search,
> but also searches the current file and more importantly, it might call
> :vimgrep and :vimgrep is known to be slow if many files have to be
> searched. Not sure if there is anything to improve, perhaps adding a
> switch to only do tag completion would already help?
>
> Anyhow, first please create a vimscript profile, so we can exactly see
> when it is slow. See :h :profile and this stackoverflow answer:
> https://stackoverflow.com/a/12216578/789222

…and note that the :profile command requires the +profile feature,
normally excluded at compile-time except in Huge builds.
>
> Perhaps this can share some more light on the slowness.
>
> Thanks,
> Christian
> --
> Dieser Satz beinhalten drei Fehller.

Best regards,
Tony.

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