Christian Weisgerber wrote:

>> My understanding is that '-O3 -funroll-loops' gives the next encoder
>> and/or decoder performance.
>
> Or it triggers compiler bugs and -funroll-loops makes the code
> slower because it overflows the instruction cache.



FLAC has its own test suite and AFAIK it passes all the tests.

And -O3 implies -ftree-vectorize which can speed up en-/decoding.
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