Clover takes much time, about 1 minute to start

Hi guys!

I have recently installed Sierra and installed clover. It seems all things are good, but when I start my PC, from I start the PC until I see logo clover and the differents systems, it takes about 1 minute. I think it is much time, when i had Chimera it only took about 15 seconds.... what happened? is it normal? I think it is really slow start

Thanks you!