AFAIK the fastfloat benchmark is a single translation unit anyway. Whole program optimization and LTO buys you nothing there. GCC and clang are both conservati

AFAIK the fastfloat benchmark is a single translation unit anyway. Whole program optimization and LTO buys you nothing there. GCC and clang are both conservative with instruction set withou march option. I'm often disappointed by MSVC codegen when examining it in godbolt, I'm not surprised by the results here.