How to fix 2-second freezes in Indiana Jones and the Great Circle?

Exploring ancient ruins, the screen would freeze completely for 1-2 seconds, which is a disaster for an action game. I tried setting all graphics to lowest; FPS improved, but memory usage stayed above 95% per HWMonitor, causing significant worry. I then used the GamePP Resource Scheduler to set priority to Highest and used the Process Priority Manager to disable all unnecessary background services. Frame time converged to 20-35ms per RTSS and memory temperature stabilized at 42-48℃ per HWMonitor.