Execution Time of VHDL code

Thank you for all of you for this clarification. The problem is resolved by the logic analyser. I use pin as output. At the begining of my program, i affect 1 one logic on the pin after release the program i force the output to 0;

With the logic analyser i measure the delay between 1 and 0.

I hope that is clear.

Thank you very much.:):):)