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Here is result of experiment: (Original size , with DW_AT_linkage_name for composites, % increase) clang-7.0 1926574256 1952846192 1.4% clang-tidy 1220980360 1238498112 1.4% llvm-mt 7404728 7525328 1.6 % std::cout << "hello world!" 21552 22080 2.4 % IMO, not that big price for reliable dynamic type identification (Full disclosure: I need depend on this feature, since I'm writing Python pretty printers for GDB ) -Roman 2018-03-02 18:12 GMT-08:00 Roman Popov <ripopov...

Mangled names can be long indeed, but pretty-printed types are also long. I can evaluate effect on size on clang codebase itself. If you disable RTTI, than obviously you can't use it. So if RTTI is disabled, we can disable mangled names in DWARF. Clang is compiled without standard C++ RTTI because it has it's own RTTI. In general, however, many libraries use standard RTTI. 2018-03-02