[theora-dev] theora 1.0a3 opt hint

[Timothy B. Terriberry]

Much of the indexing in the current libtheora is grossly inefficient. However, 
it contributes only a minor amount to the total decoding time. You could 
probably do better to spend your time optimizing something else.

That said, I think the experimental decoder I wrote in 
/experimental/derf/theora-exp is probably a better base to start applying 
optimizations to. Assuming I get a couple of hours to track down that motion 
vector problem, that is. It gave me as much as 10% speed improvements (though 
I was just talking with someone who said it was much slower with gcc3.3... we 
still haven't debugged why).

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