Intel Fortran versus C gcc fastest programs Always look at the source code. These are only the fastest programs. Look at the other programs. They may seem more-like a fair comparison to you. n-body source secs mem gz busy cpu load Intel Fortran 4.22 12 1524 4.34 100% 1% 1% 2% C gcc 4.30 8 1391 4.32 100% 0% 0% 0% spectral-norm source secs mem gz busy cpu load Intel Fortran 0.72 1,776 638 2.85 100% 100% 99% 99% C gcc 0.72 1,216 569 2.85 99% 100% 100% 99% pidigits source secs mem gz busy cpu load Intel Fortran 0.74 4,004 981 0.75 0% 0% 100% 1% C gcc 0.73 2,844 416 0.78 0% 100% 6% 0% mandelbrot source secs mem gz busy cpu load Intel Fortran 1.42 36,184 957 5.63 99% 100% 99% 99% C gcc 1.27 31,480 1135 5.08 100% 99% 100% 100% regex-redux source secs mem gz busy cpu load Intel Fortran 0.99 176,200 2225 3.06 68% 73% 71% 98% C gcc 0.80 152,244 1397 2.02 48% 53% 100% 53% binary-trees source secs mem gz busy cpu load Intel Fortran 2.38 133,752 1148 7.45 100% 70% 70% 73% C gcc 1.78 168,764 809 5.23 63% 69% 100% 62% fannkuch-redux source secs mem gz busy cpu load Intel Fortran 10.16 11,048 1158 40.55 100% 100% 100% 100% C gcc 7.53 892 910 29.41 99% 98% 100% 93% fasta source secs mem gz busy cpu load Intel Fortran 2.06 12 1351 2.06 0% 0% 0% 100% C gcc 0.82 2,900 2268 3.28 100% 99% 100% 100% reverse-complement source secs mem gz busy cpu load Intel Fortran 3.90 985,352 1019 4.11 1% 100% 4% 1% C gcc 0.87 694,780 820 1.36 18% 99% 12% 28% k-nucleotide source secs mem gz busy cpu load Intel Fortran Make Error C gcc 3.71 130,048 1506 12.15 100% 90% 82% 55% Intel Fortran Intel(R) Fortran Intel(R) 64 Compiler for applications runn304 Build 20200925_0ing on Intel(R) 64, Version 19.1.3.304 Build 20200925_000000 Copyright (C) 1985-2020 Intel Corporation. All rights reserved. FOR NON-COMMERCIAL USE ONLY C gcc gcc (Ubuntu 10.2.0-13ubuntu1) 10.2.0 all Intel Fortran programs & measurements all C gcc programs & measurements