Update Shipment (to insert Special Service) via integration(xml).

I want to update 50 Shipment, they include into ShipmentGroup. I have very long process to update (11 minutes).

I want to ask:"Is this situation is normal or bad?"

My script:

 <ShipmentGroup>
            <ShipmentGroupHeader>
               <TransactionCode>UI</TransactionCode>
               <ShipmentGroupGid>
                  <Gid>
                     <DomainName>TEST</DomainName>
                     <Xid>GROUP-1-10554701-1</Xid>
                  </Gid>
               </ShipmentGroupGid>
               <ShipmentGroupTypeGid>
                  <Gid>
                     <Xid>IMPORTER</Xid>
                  </Gid>
               </ShipmentGroupTypeGid>
               <StartTime>
                  <GLogDate>20111212000000</GLogDate>
                  <TZId>Europe/Moscow</TZId>
                  <TZOffset>+04:00</TZOffset>
               </StartTime>
               <EndTime>
                  <GLogDate>20111212000000</GLogDate>
                  <TZId>Europe/Moscow</TZId>
                  <TZOffset>+04:00</TZOffset>
               </EndTime>
               <SourceLocationRef>
                  <LocationRef>
                     <LocationGid>
                        <Gid>
                           <DomainName>TEST</DomainName>
                           <Xid>RU-MOS-LESOK-220504</Xid>
                        </Gid>
                     </LocationGid>
                  </LocationRef>
               </SourceLocationRef>
               <DestinationLocationRef>
                  <LocationRef>
                     <LocationGid>
                        <Gid>
                           <DomainName>TEST</DomainName>
                           <Xid>RU-MOS-LESOK-220504-GATE</Xid>
                        </Gid>