On Tuesday, May 23, 2017 at 9:40:02 AM UTC-7, Frew Schmidt wrote:
> On Tuesday, May 23, 2017 at 9:16:45 AM UTC-7, Frew Schmidt wrote:
> > > Perhaps you can get some more information by setting 'verbose' to a
> > > 
> > > non-zero number, e.g. ten.
> > 
> > 
> > Well, I ran it with -V10 and even after deleting both ~/.vim/ (except for 
> > the ftdetect file) and ~/.vimrc and I can still reproduce it.  It looks 
> > about the same as before: the markdown support is getting reloaded for 
> > every file instead of once at the beginning.  I don't know how to store 
> > :messages in a file or I'd attach them.
> 
> Another interesting detail: it's not slow if I set the filetype to sillybonk 
> or perl, so this is somehow related to the markdown support.  I think I'll 
> bisect the markdown files and see which one causes it, and then bisect the 
> file itself.

If I replace the contents of /usr/share/vim/vim80/syntax/vb.vim with `let 
b:current_syntax = "vb"` everything is fast and, as I would hope, the support 
files are not loaded N times per buffer but instead exactly once.

I verified as well by putting the contents back and setting the filetype to 
`vb` and I can continue to reproduce the issue.

I still don't know why ftdetect causes this and filetype.vim does not, and I 
also don't see what's wrong with the vb support files.

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