Why does Days Gone stutter when turning characters?

I was losing immersion in Days Gone because turning my character caused a distinct lag spike. I tried clearing temp files first, but it made no difference, and the frame rate still fluctuated wildly. I then used GamePP Resource Scheduler to set the game process to Real-time priority and switched the power plan to High Performance. AIDA64 showed the memory controller load stabilizing immediately. Frame generation intervals converged from 8.3-12.1ms to a steady 5.1-6.4ms. My Corsair Vengeance DDR5 6000 temperature stayed cool at 58-63℃ per AIDA64, confirming the fix works.