If you're shipping binaries to end users Microsoft's optimizer is pretty fantastic, especially if you build with PGO. Plus MinGW sometimes lags behind with thin

If you're shipping binaries to end users Microsoft's optimizer is pretty fantastic, especially if you build with PGO. Plus MinGW sometimes lags behind with things added in newer Microsoft SDKs, so there can be some friction there. I think things are getting better with clang-cl, so that might be a feasible direction in the near future.