Intel Fortran versus C++ g++ 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. regex-redux source secs mem gz busy cpu load Intel Fortran 1.73 175,952 2225 4.90 67% 62% 61% 94% C++ g++ 1.86 203,856 1315 4.49 99% 50% 48% 44% pidigits source secs mem gz busy cpu load Intel Fortran 1.74 4,012 981 1.79 0% 100% 0% 2% C++ g++ 1.82 4,312 513 1.87 1% 1% 2% 100% spectral-norm source secs mem gz busy cpu load Intel Fortran 2.07 1,764 638 8.29 100% 100% 100% 100% C++ g++ 1.99 2,408 1044 7.89 99% 99% 99% 99% n-body source secs mem gz busy cpu load Intel Fortran 8.29 8 1524 8.61 1% 0% 2% 100% C++ g++ 7.70 1,612 1879 7.81 100% 0% 1% 1% fannkuch-redux source secs mem gz busy cpu load Intel Fortran 12.58 11,036 1158 50.21 100% 100% 100% 100% C++ g++ 10.71 1,708 980 42.33 100% 96% 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++ g++ 3.96 113,236 809 12.86 74% 84% 98% 69% fasta source secs mem gz busy cpu load Intel Fortran 3.35 8 1351 3.45 0% 0% 100% 3% C++ g++ 1.46 2,024 2711 4.40 75% 76% 75% 76% mandelbrot source secs mem gz busy cpu load Intel Fortran 3.69 36,232 957 14.68 99% 99% 99% 100% C++ g++ 1.51 26,256 1791 6.01 100% 99% 99% 99% reverse-complement source secs mem gz busy cpu load Intel Fortran 4.94 985,376 1019 5.28 95% 3% 3% 6% C++ g++ 1.89 499,672 2093 1.94 100% 2% 1% 1% k-nucleotide source secs mem gz busy cpu load Intel Fortran Make Error C++ g++ 3.88 156,164 1631 12.09 72% 92% 71% 77% 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++ g++ g++ (Ubuntu 9.3.0-10ubuntu2) 9.3.0 all Intel Fortran programs & measurements all C++ g++ programs & measurements