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daniele-rapagnani avatar daniele-rapagnani commented on May 28, 2024

I finally had some time to work on this issue and I think I've tracked it down.
As I suspected in #15 the issue seems to be with seeking into the assets when loading sounds. Seeking is probably slow in general, but the seeking done at SoundFile.cpp:126 to guess the sample encoding is the one causing the slowdown when the app starts.

Edit: The above wasn't true, simply messing with the encoding caused the sounds to not be loaded in the first place giving the impression that it was the main problem. The issue was caused by two different causes. The first was that the SDL2 version I was using read files directly to seek into them rather than using Android's built-in function to seek into assets. This was fixed in the master branch of SDL2. The other one was that the assets couldn't be seeked in constant time because they were compressed and AlephOne does seeking all over the place to load sounds. Simply disabling compression for the assets reduced the loading time to less than one second.

from alephone-android.

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