Why does Genshin Impact drop to 22 FPS in Sumeru Rainforest?

Sprinting through Sumeru, my FPS suddenly plummeted from 60 to 22 per RTSS, which completely ruined the exploration vibe. I tried the Windows 'Ultimate Performance' power plan, but CPU temps hit 92℃ per HWMonitor, causing severe thermal throttling. To fix this, I used the GamePP Resource Scheduler to lock the game's CPU affinity to P-Cores and set priority to High. Cinebench R23 showed an 8% boost in response speed, and AIDA64 confirmed memory temps stayed stable at 52-58℃. The stuttering is finally gone.