Bug#750785: Slowness with context and xetex

[Norbert Preining <preining@logic.at>]

Hi Behdad,

thanks for your answer, and looking into it.

On Sun, 10 Aug 2014, Behdad Esfahbod wrote:
> Not without more context (haha).

I can give more context, easily, but I need some explanation
on *how* to print out information concerning
	hbFace
	segment_props
	engine-features
(the other two are ints and string, so easy).

> Print out the parameters being passed in to that function and we'll definitely
> see why the cache isn't working.

I will try, I am now digging throught he headers of harfbuzz to see
how to print such beasts.

> Also a simple test document is appreciated.  I'm cloning XeTeX now.  Will see
> how a build goes...

Mind the following:
* it does *NOT* happen when xetex is compiled with a static harfbuzz lib
* I only could check, but it happens when compiling xetex with
	Debian sid and testing's harfbuzz library as shared lib.

THe test document is trivial:
        \documentclass{article}
        \usepackage{fontspec}
        \begin{document}
        lots of lorem ipsum in many paragraphs
        \end{document}

So there needs to be long long text.

All the best

Norbert

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PREINING, Norbert                               http://www.preining.info
JAIST, Japan                                 TeX Live & Debian Developer
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