C gcc versus Intel C 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. mandelbrot source secs mem gz busy cpu load C gcc 1.64 27,024 1135 6.53 99% 99% 100% 100% Intel C 5.14 30,140 694 20.54 100% 100% 100% 100% k-nucleotide source secs mem gz busy cpu load C gcc 4.84 130,192 1506 16.00 98% 83% 63% 87% Intel C 8.18 130,160 1506 15.09 60% 27% 33% 65% n-body source secs mem gz busy cpu load C gcc 7.30 8 1391 7.41 0% 1% 100% 0% Intel C 11.38 960 1490 11.56 0% 5% 96% 0% fannkuch-redux source secs mem gz busy cpu load C gcc 8.73 696 910 34.46 100% 95% 100% 100% Intel C 11.95 4,004 910 46.94 100% 99% 100% 94% reverse-complement source secs mem gz busy cpu load C gcc 1.92 551,900 820 2.58 20% 99% 14% 1% Intel C 2.12 515,588 820 8.33 98% 98% 98% 100% regex-redux source secs mem gz busy cpu load C gcc 1.42 152,192 1397 3.40 100% 48% 48% 44% Intel C 1.47 154,760 1397 4.25 61% 66% 63% 99% spectral-norm source secs mem gz busy cpu load C gcc 1.98 988 569 7.89 99% 99% 100% 99% Intel C 1.99 4,000 463 7.96 99% 100% 100% 100% pidigits source secs mem gz busy cpu load C gcc 1.75 2,608 452 1.80 67% 0% 2% 33% Intel C 1.75 3,052 452 1.78 1% 1% 99% 0% binary-trees source secs mem gz busy cpu load C gcc 3.59 168,896 809 11.86 77% 74% 98% 82% Intel C 3.34 170,684 809 11.46 73% 89% 81% 100% fasta source secs mem gz busy cpu load C gcc 1.46 2,948 2268 5.84 100% 99% 100% 99% Intel C 1.25 5,188 2268 4.97 99% 99% 100% 99% C gcc gcc (Ubuntu 9.3.0-10ubuntu2) 9.3.0 Intel C Intel(R) C 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 all C gcc programs & measurements all Intel C programs & measurements