Hi,
I have just received my copy of the Intel Fortran compiler (Linux) as an Open Source Contributor. I first idea I had was to compare it to the gfortran compiler. As a benchmark I have tried the following code:
https://github.com/marcobruns/fortran_performance_for_neural_networks/bl...
with gfortran the compiled code took 24.5sec to be executed and the with ifort it took 219.4sec!!!!! The blas version of the code (same repository quoted above) performed with nearly identical execution durations close to 3.5sec.
Why does it take so much longer when compiled with ifort.
I am using the following compiler versions:
gfortran: GNU Fortran (Ubuntu 7.3.0-27ubuntu1~18.04) 7.3.0
Intel Fortran: Intel(R) Fortran Intel(R) 64 Compiler for applications running on Intel(R) 64, Version 19.0.3.199 Build 20190206
Thank you very much in advance for any kind of constructive criticism.
Best Wishes
Marco