CRC: Consider separating feeding from reading #5335
Description
Crc::feed_byte() writes a byte to the CRC, and then reads the result and returns it. So if you plan on repeatedly feeding bytes to the CRC before you need the final result, all but the last read are wasted. It makes more sense to me to have feed_byte() return nothing, and when you are done, call a separate read function. This could allow the optimizer to do a REP MOVS type of thing to blast an entire array into the CRC without having to keep going back and forth between writing one byte and reading the resulting CRC only to discard it.