The ObjectIdentifierValue.toString() method makes recursive calls in order to create the OID string. This is not optimal for performance if the method is queried often.

Mohamed Ben Hedi Sghaier of Alcatel has contributed the following patch to address this issue:

private valueString=null;
public String toString() {
       if(valueString==null)
       {
           String tempValue;
           if (parent == null) {
               tempValue= String.valueOf(value);
           } else {
               tempValue= parent.toString() + "." + String.valueOf(value);
           }
           valueString=tempValue;
       }
       return valueString;
   }