...

For the best performance the latest file format should be used. For example, create the file as follows:  

   fapid = H5Pcreate (H5P_FILE_ACCESS);

...

   status = H5Pset_libver_bounds (fapid, H5F_LIBVER_LATEST,H5F_LIBVER_LATEST);

...

   file_id = H5Fcreate(FILENAME, H5F_ACC_TRUNC, H5P_DEFAULT, fapid);

...

   status = H5Pclose (fapid);

...