It may be the default fp mode for msvc is causing C++ to suffer here ( https://learn.microsoft.com/en-us/cpp/build/reference/fp-specify-floating-point-behavior?

It may be the default fp mode for msvc is causing C++ to suffer here ( https://learn.microsoft.com/en-us/cpp/build/reference/fp-specify-floating-point-behavior?view=msvc-170 https://learn.microsoft.com/en-us/cpp/build/reference/fp-spe... ). It looks like the default behavior is quite conservative it what it allows to happen - like it won't even use FMAs with the default behavior?