File list performance

[Miklos Szigetvari]

Hi

I have a very very bad performance during the source file list.
After making a dump, I got the following call stack:
 1 string::operator..(int)
                      +0000002A 
*NAMATH                                                     Call
 2        GDBAgent::strip_control(string&) const
                      +0000057E 
*NAMATH                                                     Call
 3        GDBAgent::ends_with_prompt(const string&)
                      +0000006C 
*NAMATH                                                     Call
 4 GDBAgent::handle_input(string&)
                      +000001DE 
*NAMATH                                                     Call
 5 GDBAgent::InputHP(Agent*,void*,void*)
                      +000000CA 
*NAMATH                                                     Call
 6        HandlerList::call(unsigned int,void* const,void* const) cons
                      +000000C2 
*NAMATH                                                     Call
 7 Agent::callHandlers(int,void*)
                      +00000030 
*NAMATH                                                     Call
 8        LiterateAgent::dispatch(int,const char*,int)
                      +000000FA 
*NAMATH                                                     Call
 9 LiterateAgent::inputReady(AsyncAgent*)
                      +000000A4 
*NAMATH                                                     Call
 10       AsyncAgent::dispatch(int*,unsigned long*)
                      +000000B6 
*NAMATH                                                     Call
 11       AsyncAgent::somethingHappened(void*,int*,unsigned long*)
                      +00000028 
*NAMATH                                                     Call
 12 XtAppProcessEvent
                      +00000226 
*NAMATH                                                     Call
 13 wait_for_gdb_reply(GDBReply*,int)
                      +000000E4 
*NAMATH                                                     Call
 14       gdb_question(const string&,int,bool)
                      +00000242 
*NAMATH                                                     Call
 15       SourceView::read_from_gdb(const string&,long&,bool)
                      +000003E4 
*NAMATH                                                     Call
 16 SourceView::read_indented(string&,long&,SourceOrigin&,bool)
                      +00000998 
*NAMATH                                                     Call
 17 SourceView::read_current(string&,bool,bool)
                      +000001E6 
*NAMATH                                                     Call
 18 SourceView::read_file(string,int,bool,bool)
                      +0000009E 
*NAMATH                                                     Call
 19       SourceView::show_execution_position(const string&,bool,bool,
                      +00000496 
*NAMATH                                                     Call
 20 command_completed(void*)
                      +00000EB6 
*NAMATH                                                     Call
 21 GDBAgent::handle_input(string&)
                      +000007B0 
*NAMATH                                                     Call
 22 GDBAgent::InputHP(Agent*,void*,void*)
                      +000000CA 
*NAMATH                                                     Call
 23       HandlerList::call(unsigned int,void* const,void* const) cons
                      +000000C2 
*NAMATH                                                     Call
 24 Agent::callHandlers(int,void*)
                      +00000030 
*NAMATH                                                     Call
 25       LiterateAgent::dispatch(int,const char*,int)
                      +000000FA 
*NAMATH                                                     Call
 26 LiterateAgent::inputReady(AsyncAgent*)
 27       AsyncAgent::dispatch(int*,unsigned long*)
                      +000000B6 *NAMATH
 28       AsyncAgent::somethingHappened(void*,int*,unsigned long*)
                      +00000028 *NAMATH
 29 DoOtherSources
                      +00000058 *NAMATH
 30 XtAppNextEvent
                      +00000078 *NAMATH
 31 process_next_event()
                      +00000182 *NAMATH
 32 ddd_main_loop()

Seems to me in the source_view the the strip_control function is called 
again and again for the whole chunk, still has listed , and it leads to 
a terrible performance for
a larger file (10 000 lines or more ).
Somebody else has noticed this ? Any way to avoid ?