Fastest cpu secs C gcc versus C++ g++ Always look at the source code. If the fastest programs are hand-written vector instructions, does the host language matter? You might be more interested in the less optimised programs — more cpu seconds, less gz source code. fannkuch-redux source mem gz cpu C gcc #6 1,044 1576 8.26 C++ g++ #6 2,000 1528 12.93 C gcc #4 964 1183 13.89 C++ g++ #7 992 1150 13.89 C gcc #5 1,072 910 29.38 C++ g++ #5 2,000 980 29.40 C++ g++ #4 2,216 1439 40.52 C++ g++ #3 988 593 40.55 C gcc #3 1,016 567 42.18 C++ g++ #2 2,224 1440 42.64 C++ g++ 2,164 1059 42.76 C gcc 988 508 43.27 C gcc #2 1,140 1557 45.01 n-body source mem gz cpu C gcc #9 992 1633 2.12 C++ g++ #0 964 1927 2.17 C++ g++ #2 1,944 1879 4.06 C gcc #8 8 1391 4.10 C++ g++ #7 1,976 1808 4.28 C gcc #4 1,304 1490 4.44 C++ g++ #9 1,260 1530 4.90 C++ g++ #6 1,300 1668 5.65 C++ g++ #4 1,040 1428 5.68 C++ g++ #3 1,280 1396 5.74 C++ g++ 1,260 1659 5.93 C++ g++ #8 1,220 1517 6.08 C gcc #5 1,020 1429 6.10 C++ g++ #5 1,944 1749 6.11 C gcc #7 1,300 1244 6.79 C gcc #2 1,264 1263 7.19 C gcc #6 1,304 1180 7.21 C gcc #3 1,304 1208 7.23 C gcc 1,264 1173 7.55 spectral-norm source mem gz cpu C gcc #6 1,068 1197 1.57 C gcc #5 1,344 569 2.85 C++ g++ #6 1,348 1044 2.85 C gcc #4 1,352 1139 2.85 C++ g++ #5 2,048 1044 5.26 C++ g++ 1,964 452 5.36 C gcc 1,248 383 5.38 C gcc #3 1,348 463 5.68 C++ g++ #8 1,348 1278 6.09 mandelbrot source mem gz cpu C++ g++ #4 34,720 3542 3.27 C++ g++ 32,336 1791 3.48 C++ g++ #6 31,792 1002 3.88 C++ g++ #0 34,712 2739 4.06 C gcc #6 31,244 1135 5.12 C gcc #8 33,068 782 6.29 C++ g++ #8 34,448 742 13.19 C++ g++ #5 33,640 590 13.37 C++ g++ #9 34,428 726 13.48 C gcc #4 32,704 799 13.81 C gcc #7 33,108 994 13.87 C gcc 29,692 822 13.91 C++ g++ #7 34,392 1017 13.92 C gcc #3 29,840 763 13.99 C gcc #9 32,904 694 16.03 C++ g++ #2 34,176 692 17.47 C gcc #2 1,040 400 25.30 C++ g++ #3 1,976 414 28.53 pidigits source mem gz cpu C++ g++ #4 4,220 513 0.71 C++ g++ #5 4,284 798 0.72 C gcc 2,648 452 0.73 C gcc #2 2,920 416 0.74 regex-redux source mem gz cpu C gcc #5 152,220 1397 2.02 C++ g++ #6 275,924 2850 2.20 C gcc #2 103,084 1115 3.23 C gcc #4 152,056 1230 3.24 C gcc #3 103,540 1266 3.31 C++ g++ #4 203,888 1315 3.39 C++ g++ 207,788 656 3.57 C++ g++ #2 198,316 700 3.69 C++ g++ #5 214,888 852 4.28 C++ g++ #3 217,248 853 18.28 fasta source mem gz cpu C gcc #9 1,256 1463 0.78 C gcc #5 1,052 1281 1.30 C++ g++ #8 2,720 2751 1.52 C++ g++ #2 2,004 1127 1.85 C++ g++ 2,000 1057 1.97 C++ g++ #3 1,964 1307 2.62 C gcc #8 1,044 1293 2.74 C gcc #6 2,140 1930 2.76 C gcc #4 1,020 1240 3.06 C gcc #2 2,860 2268 3.25 C gcc #7 2,864 2011 3.28 C++ g++ #4 1,016 1287 3.36 C gcc 1,016 1206 3.67 C++ g++ #5 4,540 2344 3.75 C++ g++ #6 4,564 2324 3.89 C gcc #3 972 819 4.49 C++ g++ #7 Make Error k-nucleotide source mem gz cpu C++ g++ #2 156,416 1631 5.92 C gcc 130,156 1506 12.31 C++ g++ #3 165,588 1276 14.14 C++ g++ 756,320 1446 14.54 reverse-complement source mem gz cpu C gcc #7 499,132 1965 0.57 C++ g++ #2 499,708 2093 0.64 C gcc #8 499,184 1627 0.77 C gcc #6 688,416 820 1.27 C gcc #5 994,088 647 1.42 C gcc #2 994,152 750 1.45 C++ g++ #3 500,008 840 2.62 C gcc #4 500,416 709 3.49 C++ g++ #6 1,513,136 1832 4.00 C++ g++ 979,988 592 6.34 C++ g++ #5 765,148 720 34.88 binary-trees source mem gz cpu C++ g++ #7 168,192 890 3.38 C++ g++ #5 200,020 885 4.10 C++ g++ #9 135,652 809 4.16 C gcc #2 168,384 809 4.32 C++ g++ #3 265,220 945 4.65 C gcc #3 134,068 836 4.71 C++ g++ #6 265,784 844 4.72 C++ g++ #8 265,808 820 5.05 C++ g++ 1,947,704 754 8.99 C gcc 263,664 654 22.16 C++ g++ #2 265,180 508 22.61 C gcc #5 351,304 908 32.02 C++ g++ #4 Make Error C gcc 11.2.0-19ubuntu1 C++ g++ 11.2.0-19ubuntu1 all C gcc programs & measurements all C++ g++ programs & measurements