Improve Performance of Grouped UITableView -

i experiencing long loading time grouped uitableview. read through other posts on topic , not able find improve performance. looking point me in right direction in re-engineering code.

there 8 sections , 32 cells. cells belong 1 of 5 different custom uitableview cell sub classes. subclasses contain subviews , put using ib.

the tableview data generated plist contains information on cell type, label , view controller link pushed uinavigationcontroller. sample of xml file shown below. complicated plist part of problem?

<dict>         <key>header</key>         <string>property information</string>         <key>data</key>         <array>             <dict>                 <key>tableview</key>                 <string>informationtable</string>                 <key>link</key>                 <string>roipropertyinfouiviewcontroller</string>                 <key>entity</key>                 <string></string>                 <key>image name</key>                 <string>runtime</string>                 <key>cell type</key>                 <string>roiuitableviewcelltype3</string>                 <key>label</key>                 <string>runtime</string>             </dict>         </array>     </dict> 

another potential problem long cellforrowatindexpath method decides class of uitableviewcell load depending on written in plist file. contributing factor?

here parsing code:

-(void)setplistfilename:(nsstring *)plist fortableview:(uitableview *)tableview  if (tableview==maintableview) {         nsstring *path = [[nsbundle mainbundle] pathforresource:plist oftype:@"plist"];         self.maintabledataarray = [[nsarray alloc ] initwithcontentsoffile:path];         nslog(@"count of maintablearray %d", maintabledataarray.count); } 

[tableview setdatasource:self]; [tableview setdelegate:self];

[tableview setsectionfooterheight:0]; [tableview setsectionheaderheight:0]; 

}

here portion of cellforrowatindexpath method:

   - (uitableviewcell *)tableview:(uitableview *)tableview cellforrowatindexpath:(nsindexpath *)indexpath {         nsmutablearray *tmpdataset = [[nsmutablearray alloc]init];       if (tableview==self.maintableview) {         int section = [indexpath section];         tmpdataset = [[self.maintabledataarray objectatindex:section] valueforkey:@"data"];     }            //**figure out cell type     nsstring *celltypestring = [[tmpdataset objectatindex:[indexpath row]] valueforkey:@"cell type"];     nslog(@"cell type string %@", celltypestring); //***create different types of cells depending on listed in plist***     if ([celltypestring isequaltostring:@"roiuitableviewcelltype1"]) {         roiuitableviewcelltype1 *c = [tableview dequeuereusablecellwithidentifier:celltypestring];          if(!c)         {             c = [[roiuitableviewcelltype1 alloc]initwithstyle:uitableviewcellstyledefault reuseidentifier:celltypestring];          }       //  maintableviewheight += [roiuitableviewcelltype1 retruncellheight];         nslog(@"maintableviewheight = %f", self.maintableviewheight);          return [self setcellcontentfromdataarray:tmpdataset forcell:c forindexnumer:[indexpath row]]; 

the table contains 1 image , not load data network. advice on should spend time fixing.