The compilation time degradation is being tracked at [QTBUG-97601] Compilation speed decrease with Qt 6.2 compared to Qt 5.15.2 - Qt Bug Tracker<https://bugreports.qt.io/browse/QTBUG-97601>
For Qt Creator I use https://ccache.dev/ (yes, it works with MSVC) so that even if it takes longer to compile, I won't be compiling the same file in same situation twice. Cheers, Cristian ________________________________ From: Interest <interest-boun...@qt-project.org> on behalf of Hamish Moffatt via Interest <interest@qt-project.org> Sent: Monday, July 24, 2023 06:11 To: interest@qt-project.org <interest@qt-project.org> Subject: [Interest] slower compilation with Qt6 I've just finished porting my application from Qt 5.15 to 6.5, and I'm finding that compilation is significantly slower now - builds take twice as long or more. For example a linux-g++ build of a project with ~650 .o files has gone from 45 seconds to 100. I see similar increases on Windows with MSVC2022, and in other projects with more compilation units. I'm already using precompiled headers, including a bunch of Qt headers and some STL. The next MSVC2022 preview release has a "Build Insights" feature which shows time spent processing header files, and my biggest culprits are some headers of mine that use a lot of Q_GADGET and Q_PROPERTY macros. Does anyone have any suggestions on how to speed things up? I see some other comments about this online for example https://forum.qt.io/topic/142309/compilation-times-with-qt6/12 Thanks Hamish _______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
_______________________________________________ Interest mailing list Interest@qt-project.org https://lists.qt-project.org/listinfo/interest
