On Wed, Dec 1, 2021 at 8:32 AM Adam Light <acli...@gmail.com> wrote: > > > On Wed, Dec 1, 2021 at 1:59 AM Eike Ziller <eike.zil...@qt.io> wrote: > >> Hi, >> >> I have got a fix for macOS (in LLVM), and a similar patch that _might_ >> improve things on Windows too >> >> https://codereview.qt-project.org/c/clang/llvm-project/+/382042 >> >> but since we fail to reproduce the huge difference between "compiling" >> and "clangd indexing" that you observe in the first place, we have a >> difficult time verifying that this indeed helps. >> >> We have created a build of clangd with the potential fix and I've >> uploaded it here: >> >> https://download.qt.io/development_releases/prebuilt/libclang/testing/ >> >> it would be great if you could test if this improves things for you. Set >> the path to the new clangd in Tools > Options > C++ > Clangd > Path to >> executable. >> >> > I gave that a try, and after deleting my build directory it still took a > very long time for clangd to completely parse my project. Today it took 2 > hours 44 minutes. Previously, with the clangd.exe that shipped with QtC > 6.0.0-beta1, it took 3 hours 54 minutes. So today's run was substantially > faster, but still orders of magnitude greater than the ~2 minutes it takes > to fully build the same project on the same machine. > > I should have mentioned that the project itself has changed between these two tests, primarily in that I have removed about 50 directories from the qmake INCLUDEPATH variable. This change reduced compile time (~150 seconds down to ~120 seconds) and reduced the duration of the "Parsing C/C++ Files" step in Creator (I did not attempt to accurately measure this time). So it would not be surprising if it also reduced the clangd.exe parsing time.
Also, I looked at the Priority in task manager for the clangd.exe process (this is with the latest test build) and the priority is set as 8 during parsing and after parsing is completed. According to the Windows docs priority 8 is normal. Adam
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