closing big file : slow

Hi,
I have a big database :
- size = 3Mo
- tables   c4gis_param, c4gis_geo, c4gis_id
- c4gis_geo has 60rows, one field is a subview of 5 to 60 rows, in the subview one field is a 
subview of 10/50 rows

In my code I simply create a storage and extract some piece of data from c4gis_param (small table):

   if (vxg->is_file())
   {
     c4_Storage sto(vxg->get_nativesys_(),false);
     if (ok)
     {
       c4_GisSpace space;
       space.loadParams(sto); //this loads information
     }
   }
   art_delete(vxg);

the destructor of "sto" is VERY slow (several minutes), here is the call stack when I break the app 
during process :

  	kernel32.dll!77e4c75a() 	
  	cartomatique.exe!_heapchk()  Line 104 + 0x10	C
  	cartomatique.exe!_CrtCheckMemory()  Line 1500 + 0x5	C
  	cartomatique.exe!_heap_alloc_dbg(unsigned int nSize=48, int nBlockUse=1, const char * 
szFileName=0x00c85d84, int nLine=674)  Line 346 + 0x5	C
  	cartomatique.exe!_nh_malloc_dbg(unsigned int nSize=48, int nhFlag=1, int nBlockUse=1, const char 
* szFileName=0x00c85d84, int nLine=674)  Line 260 + 0x15	C
  	cartomatique.exe!operator new(unsigned int cb=48, int nBlockUse=1, const char * 
szFileName=0x00c85d84, int nLine=674)  Line 48 + 0x17	C++
 >	cartomatique.exe!operator new(unsigned int s=48)  Line 674 + 0x1f	C++
  	cartomatique.exe!c4_FormatV::SetupAllSubviews()  + 0x89	C++
  	cartomatique.exe!c4_FormatV::HasSubview()  + 0xf	C++
  	cartomatique.exe!c4_HandlerSeq::Restructure()  + 0x49	C++
  	cartomatique.exe!c4_HandlerSeq::Restructure()  + 0x1fb	C++
  	cartomatique.exe!c4_HandlerSeq::DetachFromParent()  + 0x33	C++
  	cartomatique.exe!c4_HandlerSeq::~c4_HandlerSeq()  + 0x2e	C++
  	cartomatique.exe!c4_HandlerSeq::`scalar deleting destructor'()  + 0x8	C++
  	cartomatique.exe!c4_Sequence::DecRef()  + 0xc	C++


Before making a separate test, does anybody have an idea of what's happening ?
Thanks



-- 
Riccardo Cohen

Articque
Les Roches
37230 Fondettes
France
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tel: +33 02 47 49 90 49
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