Precompiled headers

[petrasvestartas]

I am trying to enable precompiled headers as in cpp only project. But pip install is still quite slow.

I do it like this:

target_precompile_headers(wood_cpp_nano_ext PRIVATE "${CMAKE_SOURCE_DIR}/src/wood_cpp/cmake/stdafx.h") # With PUBLIC they will be used by targets using this target

set(CMAKE_PCH_INSTANTIATE_TEMPLATES ON)

My c++ project is here:
https://github.com/petrasvestartas/wood_cpp_nano/blob/main/CMakeLists.txt

How can I speed nanobind compilation process or enable properly precompiled headers?