Things are much better in 2024 in MSVC than they were in 2014. The overhead today is mostly the additional metadata associated with tracking the state, and most of the inline compatibilities were worked through (with a ton of work by the compiler devs). So it's a binary size issue. We've even been working on that (I remember doing work to combine adjacent identical regions, etc). Not sure what the status is in GCC/LLVM today.I'm just a little sore about it because it was being sold as a "hey here is an optimization!" and it very much was not, at least from where I was sitting. I thought this was a very very good case of having it be UB (I think the entire class of user source annotations like this should be UB if the runtime behavior violates the user annotation)
aw1621107|1 year ago
Do you think optimizations could eventually bring the std::terminate version of noexcept near/up to par with a hypothetical UB noexcept, or do you think that at least some overhead will always be present?