How to decide whether to use engine netcdf4 or h5netcdf when opening netcdf file using xarray

Question

All, Sometimes, using engine=h5netcdf when opening netcdf4 makes processing much faster than depending on the default engine netcdf4, for example as stated here github,

data = xr.open_dataset(datafile.nc, engine=‘h5netcdf4’)

Do you have any idea how to decide when to use engine h5netcdf4?

Thanks