* thank you for list of finshed tasks

* g++ -O3 main_blas.cpp bench_funcs_blas.cpp bench_funcs.cpp -lblas
* g++ -O3 main.cpp bench_funcs.cpp bench_funcs.cpp  ==> problems because *.cpp is included in main file [-1]

* clang-tidy *.cpp -checks=llvm-*,-llvm-header-guard -header-filter=.* -enable-check-profile -extra-arg="-std=c++17" -extra-arg="-fopenmp" -- *.cpp > gh_codecheck.txt

* see also annotated PDF  gh_code_Pizzo.pdf
* more flexibilty which test to run:
     See main_blas.cpp and comments   // GH   // HG

* run benchmarks more than once (rule of thumb: 10 sec run time)