MaskRay added a comment. In D131465#3776841 <https://reviews.llvm.org/D131465#3776841>, @nikic wrote:
> 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. Thanks for the analysis. C++'s fault then... 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
