[libcxx-commits] [libcxxabi] [libcxx] Added support ccache for speedup recompilation libcxx and libcxxabi (PR #78470)

[Nikolas Klauser via libcxx-commits]

philnik777 wrote:

> It could be nice to have ccache for tests, as seems compilation is significant part of check-cxx.

Yes, but it also feels kind-of scary to cache tests. I guess it depends on what kinds of speedups we could expect whether I'd deem it worth it. We have a lot of dependencies, so it's not that unlikely that we'd have to re-compile large parts of the tests anyways. Especially when modifying headers like `<type_traits>`. Moving the jobs to use modules might be a better strategy to reduce build times.

https://github.com/llvm/llvm-project/pull/78470