Miroslav Lichvar wrote:
In the measurements comparing 32-bit and 64-bit words you posted later, I'm wondering why there is a slow down in decoding of 24-bit files. Does profiling show it comes from the read_rice_signed_block() function or something else? Could it be slower SWAP_BE_WORD_TO_HOST or COUNT_ZERO_MSBS2?
The difference is so small that it's difficult to find a place where FLAC__BYTES_PER_WORD==8 is slower than 4. Also I don't know how to perform profiling in MSYS/MinGW ecosystem. Profiling in MSVS2015 hints that for some reason crc16_update_word_() may take more time if FLAC__BYTES_PER_WORD==8. Maybe the new code (the patch is attached) is faster? Currently I can't measure the difference with high enough precision, the measurement error on my current system is too high :(
crc16.patch
Description: Binary data
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