C++ g++ versus Python 3 fastest performance 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 seconds, less gz source code. fannkuch-redux source secs mem gz cpu secs C++ g++ #6 3.23 10,936 1528 12.80 C++ g++ #7 14.04 10,912 1150 14.04 C++ g++ #5 7.99 10,936 980 31.23 C++ g++ #3 36.06 10,908 593 36.05 C++ g++ #2 9.51 10,912 1440 37.33 C++ g++ #4 9.82 10,912 1439 38.52 C++ g++ 10.39 10,912 1059 40.77 Python 3 #6 913.87 11,080 385 913.83 Python 3 #4 285.20 14,264 950 1,123.47 n-body source secs mem gz cpu secs C++ g++ #0 2.14 10,960 1927 2.14 C++ g++ #2 4.44 10,960 1879 4.44 C++ g++ #7 4.44 10,960 1808 4.44 C++ g++ #9 4.88 10,960 1530 4.88 C++ g++ #4 5.44 10,960 1428 5.44 C++ g++ #6 5.70 10,960 1668 5.70 C++ g++ #3 5.76 10,960 1396 5.76 C++ g++ 5.97 10,960 1659 5.97 C++ g++ #8 6.53 10,960 1517 6.53 C++ g++ #5 6.89 11,016 1538 6.88 Python 3 383.12 11,096 1196 383.11 Python 3 #2 402.59 11,096 1242 402.57 spectral-norm source secs mem gz cpu secs C++ g++ #6 0.71 10,984 1044 2.84 C++ g++ #5 1.32 10,984 1044 5.25 C++ g++ 5.36 10,984 452 5.36 C++ g++ #8 1.52 10,992 1278 6.09 Python 3 #8 78.36 15,704 407 311.22 Python 3 #6 315.69 11,200 328 315.68 Python 3 #7 89.17 15,516 417 352.71 mandelbrot source secs mem gz cpu secs C++ g++ 0.89 34,012 1791 3.46 C++ g++ #4 0.88 34,664 3542 3.48 C++ g++ #6 0.98 34,768 1002 3.88 C++ g++ #0 2.34 34,204 2739 9.28 C++ g++ #8 4.78 34,288 742 13.11 C++ g++ #5 13.35 33,504 590 13.35 C++ g++ #9 3.50 34,292 726 13.49 C++ g++ #7 3.49 34,304 1017 13.89 C++ g++ #2 16.91 34,008 692 16.90 C++ g++ #3 28.09 10,956 414 28.09 Python 3 #7 155.28 14,244 688 616.01 Python 3 #2 Timed Out Python 3 #5 Failed pidigits source secs mem gz cpu secs C++ g++ #5 0.87 10,956 798 0.87 C++ g++ #4 0.89 10,956 513 0.88 Python 3 #3 1.25 13,564 567 1.25 Python 3 #5 1.39 11,428 363 1.39 Python 3 #4 4.21 11,096 342 4.21 regex-redux source secs mem gz cpu secs C++ g++ #6 1.13 275,984 2850 2.18 Python 3 #2 1.38 168,144 1403 2.65 C++ g++ 3.55 211,848 656 3.55 C++ g++ #2 2.83 212,460 700 3.59 C++ g++ #5 3.78 215,276 852 4.49 Python 3 8.02 460,684 512 14.90 C++ g++ #3 13.26 217,376 853 19.13 C++ g++ #4 Make Error fasta source secs mem gz cpu secs C++ g++ #8 0.77 10,944 2751 1.52 C++ g++ #2 1.87 10,940 1127 1.86 C++ g++ 1.96 10,936 1057 1.96 C++ g++ #3 2.64 10,940 1307 2.64 C++ g++ #4 3.34 10,940 1287 3.34 C++ g++ #5 1.04 10,940 2344 3.66 C++ g++ #6 1.03 10,936 2324 3.83 Python 3 #2 49.99 11,088 1121 49.99 Python 3 #3 50.28 11,088 1003 50.27 Python 3 58.84 11,092 817 58.84 Python 3 #5 33.40 827,232 1947 61.49 C++ g++ #7 Make Error k-nucleotide source secs mem gz cpu secs C++ g++ #2 1.96 156,360 1631 5.87 C++ g++ #3 4.16 165,784 1276 13.84 C++ g++ 6.80 756,220 1446 14.43 Python 3 #3 44.13 262,348 1967 165.01 Python 3 58.56 379,464 607 211.98 Python 3 #8 69.21 505,836 655 214.24 reverse-complement source secs mem gz cpu secs C++ g++ #2 0.68 499,568 2093 0.68 C++ g++ #6 3.03 1,515,936 1832 4.05 Python 3 #3 4.96 508,412 796 4.95 C++ g++ 6.35 979,820 592 6.35 Python 3 #5 3.72 1,500,212 954 6.76 Python 3 8.53 1,986,544 479 8.53 Python 3 #2 8.58 1,788,056 434 8.58 Python 3 #6 6.17 2,484,084 814 9.23 Python 3 #4 12.04 4,002,656 335 12.04 C++ g++ #5 35.73 771,156 720 35.72 C++ g++ #3 Bad Output binary-trees source secs mem gz cpu secs C++ g++ #7 0.94 201,600 890 3.31 C++ g++ #5 1.13 200,428 885 4.05 C++ g++ #9 1.45 135,832 809 4.10 C++ g++ #6 1.80 265,520 844 4.39 C++ g++ #3 1.80 265,092 945 4.69 C++ g++ #8 2.14 265,536 820 5.12 C++ g++ 2.65 1,946,308 754 9.06 C++ g++ #2 23.13 265,616 508 23.13 Python 3 #2 104.73 271,980 338 104.72 Python 3 #5 35.33 274,884 660 125.79 Python 3 #4 34.53 276,752 472 125.93 Python 3 35.93 276,952 589 126.44 Python 3 #3 50.99 672,016 1238 142.94 C++ g++ #4 Make Error C++ g++ Ubuntu 12.2.0-3ubuntu1 Python 3 Python 3.11.1 all C++ g++ programs & measurements all Python 3 programs & measurements