Re: Slow Python syntax highlighting

François Ingelrest <francois.ingelrest@gmail.com> wrote:

> Hi all,
>
> I'm not sure when this started, but for some Python files there's a
> noticeable lag due to syntax highlighting.
>
> For example, using O to open a new line can take up to a few hundreds
> of ms at some places of the file while it's instantaneous at some
> other places of the same file. I say it's caused by syntax
> highlighting because disabling it solves the issue. I couldn't find a
> pattern explaining why some parts are slower.
>
> The file is not a big one (457 lines / 17kB), its doesn't have long
> lines (max is around 250 chars) and I'm using the syntax file provided
> by Vim, not a custom one. I don't use any plugins at all (related to
> Python or not).
>
> I tried using :syntime (i.e., on / off / report) but I couldn't spot a
> difference between a 'fast' place and a 'slow' place. I may not have
> used it properly.
>
> I'm using a huge 8.0.19 build on a 64 bits Debian Jessie. I'm using
> Vim in a Gnome terminal, I don't use GVim.
>
> Any suggestions where to look for?
>
> Thanks.


Can you provide a file where it happens and a minimalistic
vimrc, just enough to reproduce it?

Thanks
Dominique

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