Where is the best place for HMR, sip-interface or realm-config?

Hello i have write some HMR who changes the FROM PAI and other .....

I have used element chars and type for matching and don´t search complete strings , My itension was

as i learned it to keep it much performand as i can. For example i need an in-manipulation rule.

 

My question is , where is the most performance place to but the HMR

in the sip-interface or the realm-config ?

 

And which are the differences .

Any Idea ?

 

Thanks

Athanasios