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. pidigits source secs mem gz busy cpu load Intel Fortran 1.74 4,012 981 1.79 0% 100% 0% 2% C gcc 1.75 2,608 452 1.80 67% 0% 2% 33% spectral-norm source secs mem gz busy cpu load Intel Fortran 2.07 1,764 638 8.29 100% 100% 100% 100% C gcc 1.98 988 569 7.89 99% 99% 100% 99% n-body source secs mem gz busy cpu load Intel Fortran 8.29 8 1524 8.61 1% 0% 2% 100% C gcc 7.30 8 1391 7.41 0% 1% 100% 0% regex-redux source secs mem gz busy cpu load Intel Fortran 1.73 175,952 2225 4.90 67% 62% 61% 94% C gcc 1.42 152,192 1397 3.40 100% 48% 48% 44% fannkuch-redux source secs mem gz busy cpu load Intel Fortran 12.58 11,036 1158 50.21 100% 100% 100% 100% C gcc 8.73 696 910 34.46 100% 95% 100% 100% binary-trees source secs mem gz busy cpu load Intel Fortran 5.48 114,064 1148 16.65 65% 79% 89% 71% C gcc 3.59 168,896 809 11.86 77% 74% 98% 82% mandelbrot source secs mem gz busy cpu load Intel Fortran 3.69 36,232 957 14.68 99% 99% 99% 100% C gcc 1.64 27,024 1135 6.53 99% 99% 100% 100% fasta source secs mem gz busy cpu load Intel Fortran 3.35 8 1351 3.45 0% 0% 100% 3% C gcc 1.46 2,948 2268 5.84 100% 99% 100% 99% reverse-complement source secs mem gz busy cpu load Intel Fortran 4.94 985,376 1019 5.28 95% 3% 3% 6% C gcc 1.92 551,900 820 2.58 20% 99% 14% 1% k-nucleotide source secs mem gz busy cpu load Intel Fortran Make Error C gcc 4.84 130,192 1506 16.00 98% 83% 63% 87% Intel Fortran Intel(R) Fortran Intel(R) 64 Compiler for applications running on Intel(R) 64, Version 19.1.1.217 Build 20200306 Copyright (C) 1985-2020 Intel Corporation. All rights reserved. FOR NON-COMMERCIAL USE ONLY C gcc gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0 all Intel Fortran programs & measurements all C gcc programs & measurements