[Mono-bugs] [Bug 362022] [performance] Animation is slow in Bubble mark with 32+ balls

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https://bugzilla.novell.com/show_bug.cgi?id=362022

User spouliot at novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=362022#c8





--- Comment #8 from Sebastien Pouliot <spouliot at novell.com>  2008-06-13 07:03:37 MDT ---
I made a patch* to cache PathFigure::ComputeBounds. As expected the data looks
completely different.

* PathFigure::ComputeBounds completely disappear from the data. 

* pixmanFetchSourcePict and _gradient_walker_pixel are both, individually,
bigger than _cairo_bentley_ottmann_tessellate_polygon (which was not the case
before). The later is still present because it's used when drawing
(stroke/fill) not just when computing bounds.

    -> caching the shapes that make the balls would greatly reduce those 3
calls.

Sadly this big data change does not result in a big FPS change. I gain about
1-2fps on SLED10 x86 and 2-3fps on openSUSE10.3 x86_64. Not sure why I still
get a big difference with the performance we had last fall :(


* needs more testing before committing.


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