Run more events very fast

Hi Dear geant4 user !
I’m simulating the HPGe detector. When I run more events something like 10*9, it’s take enough time. My request is, can someone have any idea for help, to run too fast ??
Thank !

There is no magic way to do. 1e9 is a serious number anyway.

→ Keep code as possible as lightweight in stepping action.
→ Don’t use tessellated geometry if possible
→ Simulate only what you need. (Set required cuts in physics list)
→ Switch to TBB

Alright !!
Thank for your reply