Eh, doubtful. Sure, it'll be faster than unoptimized C. But when you observe strict aliasing rules in C a modern compiler will generally produce similar quality

Eh, doubtful. Sure, it'll be faster than unoptimized C. But when you observe strict aliasing rules in C a modern compiler will generally produce similar quality assembly for both languages. The reason BLAS is so fast is that every single line of code in a hot loop has been hand-optimized and tons of CPU-specific optimizations exist Fortran yields some of the fastest code out of the box, yes, but C/C++ can yield equivalent performance by adhering to certain basic rules.