When you encounter a new effect or area for the first time, Ryujinx compiles that shader. This typically causes a brief stutter or "micro-freeze". Persistent Storage:
When you play a game for the first time, Ryujinx must translate the original Switch code into a format your PC's graphics card understands. This "compilation" is CPU-intensive and can cause "shader stutter". Once a shader is compiled, Ryujinx saves it to a disk-based shader cache ryujinx shader caches
Open File Explorer and paste: