Reading Clob column using teradata JDBC is too slow

Hi,
 
I am using the following code to read clob data from teradata. 

String ClobString;
StringBuilder clobStringBuilder = new StringBuilder();
Clob clobData = rs.getClob("clobcolumn");
if(clobData != null) {
        int length = (int) rs.getClob("clobcolumn").length();
        int BUF_LEN = 4096;
	char[] bufr = new char[length];
	BufferedReader buffReader = new BufferedReader(clobData.getCharacterStream());
	try
	{
		//buffReader.read(bufr);
		buffReader.read(bufr, 0, length);
		//buffReader.read(bufr, 0, BUF_LEN);
		/*int c = 0;
		while((c=buffReader.read(bufr,0,BUF_LEN)) != -1) {
			clobStringBuilder.append(bufr);
		}*/
					
		/*while (null != (clobString = buffReader.readLine()))
		{
		         clobStringBuilder.append(clobString);
		}*/
	}
	catch (IOException e)
	{
	e.printStackTrace();
	}
	finally
	{
		try
		{
		buffReader.close();
		}
		catch (IOException e)
		{
		e.printStackTrace();
		}
		clobData.free();
	}
	String str = new String(bufr);

I have tried various options. My table contains 230 rows with 3 clob columns and each column contains around 7000 characters.
The above code is taking between 30-35 seconds to read all data. Please let me know, if there is any efficient way of reading clob data.
teradata database : 14.10

Am using the terdata jdbc driver version : 14.0.0.40
Regards,
Suresh.