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2008 Feb 12
2
CRC calculation performance
...rc/framing.c is using a simple, clean table lookup form. The following gives some idea of the performance improvements available on the old slows, but over large buffers, unlike the maximum 256 bytes of OGG format (if I'm understanding that correctly). http://gcc.gnu.org/ml/gcc-patches/2002-04/msg01097.html Since as I read it you're using the standard Ethernet polynomial used by zlib (& info-zip), it should be possible to have zlib provide an interface for access to the lookup arrays, or to directly calculate the OGG CRC, so that the ugliness is constrained. I note that the zlib crc32 fu...