static CommonPrefixer getBestCommonPrefixer() {
      try {
        Class<? extends CommonPrefixer> theClass =
          Class.forName(UNSAFE_COMMON_PREFIXER_NAME).asSubclass(CommonPrefixer.class);

        return theClass.getConstructor().newInstance();
      } catch (Throwable t) { // ensure we really catch *everything*
        return CommonPrefixerHolder.PureJavaCommonPrefixer.INSTANCE;
      }
    }
Lexicographically compare two arrays.
@param buffer1 left operand
@param buffer2 right operand
@param offset1 Where to start comparing in the left buffer
@param offset2 Where to start comparing in the right buffer
@param length1 How much to compare from the left buffer
@param length2 How much to compare from the right buffer
@return 0 if equal, < 0 if left is less than right, etc.
hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java