[clang] [llvm] Added partial support for compiling C++20 modules and header-units without scanning. (PR #147682)

[Chuanqi Xu via llvm-commits]

ChuanqiXu9 wrote:

> I believe that LLVM can be compiled >10x faster with my software.

If it is true, it implies the current build process spend > 90% time on build systems and build system communications, it is really hard to believe...

> I can point potential HMake users to your comment and that you are willing to merge if they are willing to become HMake users.

I am not saying this. It is just one of the conditions.

https://github.com/llvm/llvm-project/pull/147682