On Fri, 2025-01-24 at 13:01 +0100, Kai Song via Gcc-help wrote: > Hello, > > I seek advice on good CPUs and CPU benches that allow me finding a good CPU > for compiling a single c++ compile unit with the G++ compiler. > > Background: > - Many features in my code only work exclusively with G++, hence I do not > care in other compilers. > - I sometimes need recompilation for a single sign flip in the project and > that would take several minutes. Throwing (proportionately) money at it in > order to make that quicker could be advantageous. The phoronix.com website might give hardware suggestions https://www.phoronix.com/ IBM is selling powerful Linux hardware. Maybe even renting some. Probably https://www.supermicro.com/ and https://atos.net/ also (look of course at https://top500.org/ if you can afford a 1USM$ or 1M€ super- computer....) During development you might not need to enable most optimizations if you do have a reproducible and quick to run test. In other words, compile your translation unit with g++ -O1 -g2 -Wall -Wextra for simple tests. If compile time is an issue, consider spliting large C++ source code into smaller C++ files (e.g. if you have a 6KLOC C++ file split that into two). Once simple tests are passed, you could ssh to some powerful Linux server and compile and link (maybe once a day) your software product with -O3 -flto -g1 and run benchmarks remotely. It would be nice for us to understand what kind of software project you are developing (it could be a competitor of https://www.cea.fr/energies/tripoli-4 ...), for what operating systems and how many millions of C++ code lines (as measured by Wheeler's https://dwheeler.com/sloccount/ utility). regards -- Basile STARYNKEVITCH <basile@xxxxxxxxxxxxxxxxx> 8 rue de la Faïencerie 92340 Bourg-la-Reine, France http://starynkevitch.net/Basile & https://github.com/bstarynk & https://github.com/RefPerSys/RefPerSys/
