[Libreoffice] [REVIEW] 4 minutes 27 seconds -> 11 seconds

[Radek Doulik]

Hi Caolán,

the patch looks good to me.

I am also surprised by the speedup (given that it always inserts at the
end of the vector array in your case). Hard to check without the actual
document. Might be problem in std::vector not detecting that the rest of
reserved space doesn't need to be moved or something?

You might try to load the document into valgrinded libreoffice just to
be sure that it doesn't mess memory.

Cheers
Radek

On Tue, 2011-07-12 at 09:27 +0100, Caolán McNamara wrote:
> cmc->thb: I had some .doc documents which were awesomely slow to load
> up, apparently because some polygons had to be split up into large
> polypolygons due to a custom dashed line in use to draw them or
> something of that nature.
> 
> Could you double check my change to basegfx2
> http://cgit.freedesktop.org/libreoffice/libs-gui/commit/?id=2f580a32ad5dbb46cd3897316a12aea032b9e10e
> 
> I'm *sure* its good, but the scale of speed-up from 4 minutes 27 seconds
> to 11 seconds is massively more than I expected. Especially as the
> insert point is at the end, rather than at the beginning or middle which
> would have required a lot of memmove type operations.
> 
> C.
> 
> (gcc/libstdcx++ 4.6.0, CXXFLAGS=-Wp,-D_FORTIFY_SOURCE=2
> -fstack-protector --param=ssp-buffer-size=4,selinux enabled)
> 
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