Let's compare FORTRAN compilers. Let's begin with Bijan Mohammadi-Stephane Lanteri's nsc2ke Navier-Stokes solver. Everything you need is inside the zip file, including the Windows executable compiled using Compaq Visual Fortran Optimizing Compiler Version 6.1 from 1999. The executable is 315,392 bytes and the time to run is 6.65625 seconds on W10-64 on a Dell laptop with Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz. Let's see how other machines and compilers stack up. I have included the output files as well as a layout file to display the results with Tecplot and TP2.
Another example code (also 2D flow in F90) with 3 input files running in 3.3, 1.5, and 1.5 seconds. The code, inputs, and Tplot files are included.
Another example in FORTRAN and C for comparison. The FORTRAN takes 20.5 seconds and C takes 10.3 seconds. The FORTRAN does write out the results somewhat differently. All the inputs, outputs, and Tecplot files are included.
Another CFD test case (ISAAC by Joseph H. Morrison). The elapsed times are 10.25 and 4.78 seconds.
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