Sen2cor: possible to speed up or multiprocess?


I have to process a huge amount of sentinel 2 images with sen2cor at 10 m resolution. I’m runing sen2cor in SNAP, but it takes a lot of time for some images (more than 13 hours)
it’s my first time using SNAP or sen2cor so I was wondering…
Is it normal that it takes so long?
Is there any way to speed up the process or run it for several images at the same time?

Thanks for your help!