CMake memory footprint raised significantly in CMake 3.10

Large CMake projects can not be parsed successful with CMake 3.10.

In my case, CMake.exe allocates >2.5GB of ram, then QtCreator finishes with the message

Failed to parse JSON from CMake server

and the progress bar keeps staying gray (Configuring "ProjectName").

If I disable parts of the project, parsing finishes successfully, but memory consumption of cmake.exe is huge:

CMake 3.9.6: 220MB / 200MB (max/final)

CMake 3.10rc1: 1400MB / 250MB (max/final)

I also raised a CMake issue: https://gitlab.kitware.com/cmake/cmake/issues/17502

Edit: Changed title from "CMake projects do not work with CMake 3.10" to "CMake memory footprint raised significantly in CMake 3.10"

 Also affects today's QtCreator snapshot (1686 / Nov 22 2017)