Tsz-wo Sze created HADOOP-19012:
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Summary: Use CRC tables to improve galoisFieldMultiply in CrcUtil
Key: HADOOP-19012
URL: https://issues.apache.org/jira/browse/HADOOP-19012
Project: Hadoop Common
Issue Type: Improvement
Components: util
Reporter: Tsz-wo Sze
CrcUtil.galoisFieldMultiply(p, q, m) supports multiplying two polynomials p, q
modulo any modulus polynomial m over GF(2). Since the method is used for CRC
calculations, the modulus polynomial m is restricted to either the
GZIP_POLYNOMIAL or the CASTAGNOLI_POLYNOMIAL. We may use CRC tables in
PureJavaCrc32/PureJavaCrc32C to speed up the computation.
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