do you mean under loop the loop for records from client side cursor updating each record to server? If so, you can make it much faster using asinchronous transaction
Set it before loop nad do sqlcommit after 25-50 records ( may be 100) and one sqlcommit after loop, if res number of records are not devided on 25-50
This number should be found experimentally and depends from numbers and types of fields to update, free memory etc.
Do forget to set transaction to normal after circle.
Best wishes, Vladimir.