How to fix brief freezes during turn transitions in Civilization VII?

Managing a massive empire in the late game, every turn switch caused a brief freeze, making the rhythm feel sluggish. I tried enabling 'Extreme Performance Mode' in the system; while response improved slightly, the frequency of frame drops didn't change. I used the GamePP Resource Scheduler to set the process priority to High and enabled memory fragmentation cleaning. Frame time converged to 11-15ms per RTSS, and memory temperature stabilized at 45-52℃ per AIDA64, with 82-105ns latency via GamePP Sensor.