windows - Optimize Disk Enumeration and File Listing C++ -

i writing c++ code enumerate whole hdd , drive listing, takes more 15 minutes complete disk enumeration of drives (hdd capacity 500gb). , compile response in binary file.

however, have 3rd party executable gives me listing of whole disk in less 2 minutes ... can please code , suggest me performance improvement techniques.

enumfiles(cstring folderpath, cstring searchparameter,win32_find_dataw *fileinfodata) {          cstring searchfile = folderpath + searchparameter;          cstring filename;          hfile = findfirstfilew(searchfile, fileinfodata); //   \\?\c:\*              if (hfile == invalid_handle_value)             {                 // error             }           else          {                                 {                     filename = fileinfodata->cfilename;                      if (fileinfodata->dwfileattributes & file_attribute_directory)                     {                         if (! (filename == l"." || filename == l".."))                         {                                         // save folder information                           enumfiles(folderpath + filename +(l"\\"), searchparameter,fileinfodata);                         }                     }                     else                    {                      // save file parameters                      }                     } while (findnextfilew(hfile, fileinfodata)); }            findclose(hfile);        }