Hi, On 2024-04-05 15:36:34 +0200, Jelte Fennema-Nio wrote: > On Fri, 5 Apr 2024 at 00:45, Jelte Fennema-Nio <m...@jeltef.nl> wrote: > > It improved clean build times on my machine (10 cores/20 threads) from ~40 > > seconds to ~30 seconds. > > After discussing this off-list with Bilal, I realized that this gain > is only happening for clang builds on my system. Because those take a > long time as was also recently discussed in[1]. My builds don't take > nearly as long though. I tried with clang 15 through 18 and they all > took 10-22 seconds to run and clang comes from apt.llvm.org on Ubuntu > 22.04 > > [1]: > https://www.postgresql.org/message-id/flat/CA%2BhUKGLvJ7-%3DfS-J9kN%3DaZWrpyqykwqCBbxXLEhUa9831dPFcg%40mail.gmail.com
I recommend opening a bug report for clang, best with an already preprocessed input file. We're going to need to do something about this from our side as well, I suspect. The times aren't great with gcc either, even if not as bad as with clang. Greetings, Andres Freund
