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 0% 0% 0% 100% 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 1,100 569 2.86 100% 99% 100% 100% 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 2,848 416 0.75 1% 100% 1% 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 31,692 1135 5.08 100% 100% 100% 99% regex-redux source secs mem gz busy cpu load Intel Fortran 0.99 176,200 2225 3.06 68% 73% 71% 98% C gcc 0.80 152,196 1397 2.03 48% 100% 54% 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 1.79 168,760 809 5.35 64% 64% 71% 100% fannkuch-redux source secs mem gz busy cpu load Intel Fortran 10.16 11,048 1158 40.55 100% 100% 100% 100% C gcc 7.52 836 910 29.37 99% 100% 93% 99% fasta source secs mem gz busy cpu load Intel Fortran 2.06 12 1351 2.06 0% 0% 0% 100% C gcc 0.82 2,896 2268 3.26 99% 100% 100% 99% reverse-complement source secs mem gz busy cpu load Intel Fortran 3.90 985,352 1019 4.11 1% 100% 4% 1% C gcc 0.86 698,264 820 1.27 1% 18% 100% 28% k-nucleotide source secs mem gz busy cpu load Intel Fortran Make Error C gcc 3.81 130,112 1506 12.18 54% 87% 79% 100% 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