Depending on the platform that your IMS application is being deployed on, there are a number of programming techniques and environment variables that you may be able to employ that can benefit its performance.
Optimizing IMS Applications - General
Your IMS applications can be optimized using a number of programming techniques and by removing unnecessary calls.
Optimizing IMS DB Applications
Your distributed and mainframe IMS DB applications can be optimized using a number of config options and environment variables.