[aquaria] [patch] Some optimizations
false.genesis at googlemail.com
Tue Dec 13 20:02:20 EST 2011
Found a few scenarios while modding that ran really slow, and did some
profiling to find bottlenecks. I know this is probably not really useful
with the new engine code in sight, but has been some nice training at
least (first time with a profiler, yay).
I used 2 testing scenarios, and the combined results with the patch are
roughly (based on total CPU time% minus Nvidia driver minus XP kernel):
[case: Massive particle emitter + many CollideEntity's on huge map]
- Vector interpolation: 5-8%
- Game::collideCircleWithGrid() - about 3-4%
[case: Large maps (tree01, mainarea)]
- Removed hack from GridRender, 10% faster for large maps
- use memchr() instead of byte-looping: 3-4%
As the now removed hack was made only for one map, i've fixed that one
instead: - the fixed sun temple map file can be found here:
It would be nice to improve RenderObject::matrixChain(), which I *think*
is the main reason for LOTS of gfx driver <-> kernel spinlocking, but my
OpenGL/math knowledge is not good enough.
I expect it to be optimized in the new code, anyways :)
Consider this patch an experiment (not experimental, it works ;) ),
throw it in if you like, or don't.
But it would be really cool if you'd at least remove the hack in
GridRender::onRender() (currently it is #1 bottleneck in the map drawing
code), and apply the Vector class changes.
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