Slowness in Doxygen syntax

Hi all.

I found some glitches in the new MacVim version and I was wondering if

someone else already saw something like this. I talked about MacVim because I

couldn't test the Windows version yet.

I usually work with ObjC files and I set 'syntax' in the modeline, like this:

// vim:syntax=objc.doxygen

I use Doxygen for project documentation for years and it is part of my life

now. The odd glitch is that, the documented comment slows down Vim

substantially. Not in every places. Only when the cursor is in a comment block

and if that comment block has a Doxygen command like @c (code), @b (bold), @i

(italic) or @ref (cross reference). Commands like @param or @return doesn't

has the same behavior. The slowness also happens when using \c, \b, \i, \ref.

That is, the '@' character is not the culprit.

The slower [G]Vim happens only when the cursor is in the commented block. Soon

the cursor gets out of it, the movement responses are back to normal.

I try to disable some plugins, like UltiSnips and clang_complete, because I

installed them about a week ago. But that doesn't solve the problem.  So, as a

work around, I came up with:

:set syntax=objc

:set regexpengine=1

:set syntax=objc.doxygen

The problem disappeared.

I took a look at the Doxygen syntax from the new MacVim version and it didn't

change a bit. So, I think this has something to do with the new regular

expression engine.

Someone saw this problem yet?

Regards.

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