A simple HTTP Echo Server, just for educational purposes.
If you send the HTTP request with a query parameter named "num" and an integer value N, then the server will respond to you with the Nth value in the standard Fibonacci sequence.
mkdir build && cd build && cmake .. && cmake --build .
./build/main thread_count=4
ab -c 50 -n 100 http://127.0.0.1:8080/?num=40