mstorsjo wrote: > > clang/lib/CodeGen/CGBuiltin.cpp is over 1MB long (>23k LoC), and can take > > minutes to recompile (depending on compiler and host system) when modified, > > and 5 seconds for clangd to update for every edit. Splitting this file was > > discussed in this thread: > > It looks like while this makes the individual files somewhat faster to > compile, it makes the total time to compile all them _much_ higher, by a > factor of more than 3. It adds 1% to the clang build time.
I'm also seeing an increase, but not quite that much. With GCC 13, I previously saw this (for `CGBuiltin.cpp.o`): ``` real 1m23.524s user 1m22.800s sys 0m0.705s ``` Now I see this (for `CGBuiltin.cpp.o` and all the `TargetBuiltins` object files): ``` real 1m12.927s user 2m29.557s sys 0m3.611s ``` I tried looking at the compile time for the indiviual object files. The vast majority of them take around 5 seconds to compile here, but we have one single outlier - `TargetBuiltins/RISCV.cpp.o`: ``` real 1m9.225s user 1m8.728s sys 0m0.477s ``` So even if `RISCV.cpp` only has 425 lines, compiling this single file still takes >80% of the time it took the compile the previous file. https://github.com/llvm/llvm-project/pull/132252 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
