* metal : optmize FA vec for large heads and sequences * metal : adjust small-batch mul mv kernels ggml-ci * batched-bench : fix total speed computation ggml-ci * cont : add comments ggml-ci
* metal : optmize FA vec for large heads and sequences * metal : adjust small-batch mul mv kernels ggml-ci * batched-bench : fix total speed computation ggml-ci * cont : add comments ggml-ci