Reduce cdrx on latency, for SA NR cell

Hello,
Userplane latency is 15 ms when cdrx OFF.
Userplane latency is 65 ms when cdrx ON.

Can you suggest how to reduce cdrx on latency, for SA NR cell?

Inactivity timer, on duration timer fine tuning.

Actually those are fixed.

Ok, then only switch there to make it ON/OFF correct.

How do you measure latency?