Re: [Guidolib-devel] Guido library speed optimization

[Dominique F. <fo...@gr...>]

Le 29 juin 2011 à 20:13, Yu Fan a écrit :

> Hi,
>      I have Guido running on iPad now. The sheet renders very well.
>      But due to iPad's limited process power,  it took 4 to 5 second to load a small sheet.

that's strange and I don't think that it's only due to iPad limited process power. 
Could you send me the small sheet you used, I'd like to test (but I don't have an iPad)


>      I run a profile and it shows that 77% cpu time is spent on ARMusicalVoice::GetNext() function.
>     This function is call by ARMusic::doAutoBreak() for many times.

That's interesting! It means it could be improved on a very local basis. 
But how did you got this result? did you used shark? on the iPad or or your dev platform?
I've made a time profiling on my side and I got only 5,4% for ARMusicalVoice::GetNext().

More generally I agree that the engine could be improved (although it's doing quite a fast good job). 
But that's a tricky task: e.g. the ARMusicalVoice::GetNext method is complex, it could be reorganized a bit, but the risk is to broke something.

--
Dom


>     
>     Any suggestion would be appreciated!
> 
>      Thank you!
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