) to be executed entirely in user space, bypassing the heavy overhead of a full kernel transition. The "Best" Implementation:
In the Linux kernel, fpstate refers to the . This structure is critical for managing the context of the Floating Point Unit (FPU), which handles complex mathematical operations, including SSE, AVX, and MMX instructions.
When these fast calls happen, the CPU still needs to manage its floating-point state (fpstate) —the memory that holds complex decimal math. If a vDSO function isn't "the best" or isn't optimized, it might accidentally mess up that math state or waste time saving it when it doesn't need to. The "best" implementation is one where the kernel and the vDSO work in perfect harmony, ensuring that the fpstate is preserved with zero wasted cycles.
Always use Fullscreen (not Borderless Windowed) to reduce input lag.
Modern Windows operating systems are already highly optimized to handle context switching without dragging down gaming performance. ⚠️ Risks of Messing with FPState