Improved build times is _the_ reason. > and a compiler cache already does that and leads to greater gains Can you back that claim up? I've not benchmarked it

Improved build times is _the_ reason. > and a compiler cache already does that and leads to greater gains Can you back that claim up? I've not benchmarked it (and I'm not making a claim either way, you are), but a build cache isn't going to be faster than an incremental build with ninja (for example), and I can use precompiled headers for our common headers to further speed up my incrementals. You did encourage me to go back and look at sccache though, who have fixed the issues I've reported with MSVC and I'm going to give it a try this week