nikic added a comment. In D131465#3776599 <https://reviews.llvm.org/D131465#3776599>, @nikic wrote:
> It looks like the switch to `-std=c++17` has some major compile-time impact: > http://llvm-compile-time-tracker.com/compare.php?from=047c7aa96dadf8a2c71a29e2df610d628d9e7e3e&to=3e99b8d947ac024831e59be2b604ac67a24fed94&stat=instructions > The `O0` build of 7zip becomes 80% slower (without codegen changes). I suspect this is due to increased STL size in in C++17. Taking one sample file, preprocessed source is 289149 bytes with `-std=gnu++14` and 654888 with `-std=gnu++17`. The source size increased by more than a factor of two, so it's not very surprising that the parsing time also increased by the same factor. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D131465/new/ https://reviews.llvm.org/D131465 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
