How to assess performance impact of HMR

Hi,

 

Basically, I have four different HMR for our requirement and are as below:.

 

For calls from Customer

HMR 01 - Manipulates certain headers, add additional headers etc.

SBC processes the call

HMR 02 - Removes certain headers post SBC processing and prior to delivering the call to next hop

 

For calls to Customers

HMR 03 - Manipulates certain headers, add additional headers etc.

SBC processes the call

HMR 04 - Removes certain headers post SBC processing and prior to delivering the call to next hop

 

Query: Though we have various solutions for the HMRs, we would prefer to chose the one with less impact on the performance fo A-SBC.  Can you suggest some ideas on how to decide the the HMRs that would have less impact on A-SBC?