For AVX instructions, marshalling the data in and out of vectors is usually the biggest overhead. Similarly, if you use openCL,webGPU, webGL, or any other GPU-b

For AVX instructions, marshalling the data in and out of vectors is usually the biggest overhead. Similarly, if you use openCL,webGPU, webGL, or any other GPU-based language, the biggest performance overhead is generally transferring data down to and back from the GPU.