Hello,
I Run MacOs ventura 13.6 and command line tools 15.0 on MacBook Intel I7 post 2018.
After installing clang 15.0 the performance of C++ test programs shows 4 at 5 times slower execution time compared to Clang 13.0
Has anybody observed this slow down ?
The tests using a lot of mathematical computations is compiled with the folowing command :
g++ -std=c++17 -march=native -funroll-loops -Ofast -DNDEBUG -o a atest.cpp
So I had to revert to Clang 13.0 to have reasonnable execution time .
What makes C++ code so slow ?