Lightning Talk: C++ Debug Performance is Improving: What Now?
summary
Claims that debug builds are getting faster backed by examples: using std::byte can produce heavier assembly compared to char, an std::move added in a C++20 accumulate makes that debug build 1.4× slower than C++17 at -O0, and compilers emit call instructions for simple casts. GCC offers -Og, Clang recently elides many std helpers in the front end, MSVC lacks equivalent fixes, and practical workarounds include Godbolt-based inspection, macro replacements, and waiting for more front-end builtins.
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