cache outer size in Block => x1.5 speed up for a.block() = b.block()
cache outer size in Block => x1.5 speed up for a.block() = b.block()

ritsu1228/eigen,pasuka/eigen,TSC21/Eigen,TSC21/Eigen,Zefz/eigen,TSC21/Eigen,ritsu1228/eigen,pasuka/eigen,toastedcrumpets/eigen,Zefz/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,pasuka/eigen,TSC21/Eigen,pasuka/eigen,toastedcrumpets/eigen,ritsu1228/eigen,ROCmSoftwarePlatform/hipeigen,Zefz/eigen,toastedcrumpets/eigen,ROCmSoftwarePlatform/hipeigen,ritsu1228/eigen,toastedcrumpets/eigen,ROCmSoftwarePlatform/hipeigen,Zefz/eigen,pasuka/eigen