performance optimze for stdf4j #2
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performance optimize: 1. change the ByteArray to singleton 2. new Float/Double to Float/Double.valueOf 3. change the "new String(cbuf, 0, length).intern()" to new String(data, offset, length, ASCII) 4. change the Arrays.copyOfRange to System.arraycopy one 1.2G stdf file need 24s with "record.getData()" called, after optimized, the time is 6.8s~7.2s(test env, RHEL7.4, Java 1.8)
add the exception to RecordVisitor; change the record name to upper case in xml file
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the key point is change the string.intern to String(data, offset, length, ASCII)