Using byte[] compare instead of long compare when needed to convert to long 
first.
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                 Key: HBASE-1337
                 URL: https://issues.apache.org/jira/browse/HBASE-1337
             Project: Hadoop HBase
          Issue Type: Improvement
    Affects Versions: 0.20.0
            Reporter: Erik Holstad
            Priority: Minor


When comparing timestamps in the KeyValues tests have shown that it is faster 
to do a byte[] compare on the timestamps rather than converting to longs and 
then do the long compare.
In the case where you have one byte[] and one long that you need to compare it 
is better to convert both to long and do the long compare.
Some numbers:

Compare byte[] to byte[] timer 1042 ns
Compare bytes2long to bytes2long timer 3143 ns
Compare long to long timer 281 ns
bytes2long timer 1328 ns
long2bytes timer 1349 ns

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