To set a performance baseline for the improvements that follow in this tutorial, build your project with these settings:
Select Project > Properties. The project property pages window appears.
Select Configuration Properties > Fortran > Optimization .
For Optimization, select Minimum Size(/O1) from the dropdown list.
Select Fortran > Data > Default Real KIND > 8(/real_size:64).
Rebuild the project, then run the executable (Debug > Start Without Debugging). Record the execution time reported in the output. This is the baseline against which subsequent improvements will be measured.