CMake XCode generator is 10x slower than qmake xcode generator

❯ time ../../qtbase/bin/qmake ~/dev/qt/qtdeclarative/examples/quick/animation/ -spec macx-xcode
Info: creating stash file /Users/torarne/build/qt/6.x/examples/animations-qmake/.qmake.stash
../../qtbase/bin/qmake ~/dev/qt/qtdeclarative/examples/quick/animation/ -spec  0.21s user 0.16s system 51% cpu 0.721 total 

❯ time ../../qtbase/bin/qt-cmake ~/dev/qt/qtdeclarative/examples/quick/animation/ -GXcode
-- The CXX compiler identification is AppleClang 15.0.0.15000309
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Check for working CXX compiler: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ - skipped
-- Detecting CXX compile features
-- Detecting CXX compile features - done
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD
-- Performing Test CMAKE_HAVE_LIBC_PTHREAD - Success
-- Found Threads: TRUE
-- Performing Test HAVE_STDATOMIC
-- Performing Test HAVE_STDATOMIC - Success
-- Found WrapAtomic: TRUE
-- Found OpenGL: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX14.5.sdk/System/Library/Frameworks/OpenGL.framework
-- Found WrapOpenGL: TRUE
CMake Warning (dev) at /Users/torarne/build/qt/6.x/qtbase/lib/cmake/Qt6Core/Qt6CoreMacros.cmake:3339 (message):
  Qt policy QTP0004 is not set: You need qmldir files for each extra
  directory that contains .qml files for your module.  Check
  https://doc.qt.io/qt-6/qt-cmake-policy-qtp0004.html for policy details.
  Use the qt_policy command to set the policy and suppress this warning.Call Stack (most recent call first):
  /Users/torarne/build/qt/6.x/qtbase/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:3088 (__qt_internal_setup_policy)
  /Users/torarne/build/qt/6.x/qtbase/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:813 (qt6_target_qml_sources)
  /Users/torarne/build/qt/6.x/qtbase/lib/cmake/Qt6Qml/Qt6QmlMacros.cmake:1031 (qt6_add_qml_module)
  CMakeLists.txt:28 (qt_add_qml_module)
This warning is for project developers.  Use -Wno-dev to suppress it.-- Configuring done (8.9s)
-- Generating done (0.0s)
-- Build files have been written to: /Users/torarne/build/qt/6.x/examples/animations-cmake
../../qtbase/bin/qt-cmake ~/dev/qt/qtdeclarative/examples/quick/animation/   2.24s user 1.28s system 38% cpu 9.213 total