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 3.25 19,788 1535 12.89 C++ g++ #7 13.93 19,660 1156 13.93 C++ g++ #5 7.97 19,788 987 31.14 C++ g++ #3 36.80 19,660 600 36.80 C++ g++ #4 9.47 19,660 1445 37.11 C++ g++ #2 9.82 19,656 1446 38.58 C++ g++ 10.59 19,660 1065 41.61 Python 3 #6 1,031.38 19,652 391 1,031.34 Python 3 #4 300.68 19,652 960 1,189.39 n-body source secs mem gz cpu secs C++ g++ #0 2.14 19,676 1933 2.14 C++ g++ #7 3.97 19,804 1815 3.97 C++ g++ #2 4.20 19,676 1884 4.19 C++ g++ #3 5.30 19,804 1402 5.30 C++ g++ #9 5.43 19,676 1536 5.43 C++ g++ #4 5.44 19,804 1434 5.44 C++ g++ #5 6.01 19,676 1544 6.00 C++ g++ 6.49 19,676 1666 6.49 C++ g++ #8 6.57 19,676 1524 6.57 C++ g++ #6 6.89 19,676 1674 6.89 Python 3 #2 362.72 19,656 1247 362.70 Python 3 368.32 19,656 1201 368.30 spectral-norm source secs mem gz cpu secs C++ g++ #6 0.72 19,812 1050 2.84 C++ g++ #5 1.32 19,684 1050 5.25 C++ g++ 5.36 19,684 459 5.36 C++ g++ #8 1.52 19,684 1284 6.04 Python 3 #7 90.77 19,656 425 359.32 Python 3 #6 359.89 19,656 334 359.83 Python 3 #8 98.97 19,656 415 386.79 mandelbrot source secs mem gz cpu secs C++ g++ 0.89 34,944 1797 3.46 C++ g++ #4 0.89 35,200 3554 3.47 C++ g++ #6 0.98 35,072 1014 3.89 C++ g++ #0 2.35 35,328 2752 9.28 C++ g++ #8 4.79 35,072 749 13.12 C++ g++ #5 13.33 34,688 596 13.33 C++ g++ #9 3.50 35,200 732 13.49 C++ g++ #7 3.49 35,072 1023 13.90 C++ g++ #2 16.90 34,560 700 16.90 C++ g++ #3 27.26 19,804 421 27.25 Python 3 #7 159.49 19,656 698 634.00 Python 3 #3 820.95 19,624 319 820.91 Python 3 #2 232.82 156,340 790 880.90 Python 3 #5 274.66 19,628 463 1,094.30 pidigits source secs mem gz cpu secs C++ g++ #5 0.86 19,804 804 0.86 C++ g++ #4 0.88 19,804 521 0.88 Python 3 #3 1.31 19,784 573 1.31 Python 3 #4 4.73 19,656 348 4.73 Python 3 #5 Failed regex-redux source secs mem gz cpu secs C++ g++ #6 1.15 276,276 2856 2.18 Python 3 #2 1.35 168,092 1411 2.62 C++ g++ #2 2.84 212,776 706 3.60 C++ g++ 3.62 212,180 662 3.62 C++ g++ #5 3.86 215,556 859 4.54 Python 3 8.83 432,724 515 16.44 C++ g++ #3 12.41 217,580 859 17.91 C++ g++ #4 Make Error fasta source secs mem gz cpu secs C++ g++ #8 0.76 19,792 2758 1.51 C++ g++ #2 1.81 19,668 1129 1.81 C++ g++ 1.90 19,664 1064 1.90 C++ g++ #3 2.62 19,664 1311 2.62 C++ g++ #4 3.32 19,664 1291 3.32 C++ g++ #6 1.05 19,668 2326 3.85 C++ g++ #5 1.05 19,668 2345 3.88 Python 3 #2 38.53 19,652 1126 38.53 Python 3 #3 38.86 19,780 1007 38.86 Python 3 #5 26.54 827,148 1951 53.26 Python 3 60.37 19,652 823 60.37 C++ g++ #7 Make Error k-nucleotide source secs mem gz cpu secs C++ g++ #2 1.97 156,504 1634 5.87 C++ g++ #3 4.19 165,592 1280 13.77 C++ g++ 6.90 757,080 1452 14.68 Python 3 #3 48.64 262,016 1970 184.81 Python 3 #8 87.79 506,880 663 262.44 Python 3 #9 77.06 380,416 614 263.65 Python 3 275.64 500,224 499 274.74 reverse-complement source secs mem gz cpu secs C++ g++ #2 0.70 499,840 2099 0.70 C++ g++ #6 3.20 1,517,660 1827 4.22 Python 3 #3 5.18 509,108 803 5.18 C++ g++ 6.56 980,060 599 6.56 Python 3 #5 4.07 1,500,240 960 7.41 Python 3 #2 10.46 1,788,876 440 10.46 Python 3 10.69 1,987,304 484 10.69 Python 3 #6 7.86 2,484,084 821 11.49 Python 3 #4 13.91 4,003,712 343 13.91 C++ g++ #5 35.10 771,556 704 35.10 C++ g++ #3 Bad Output binary-trees source secs mem gz cpu secs C++ g++ #7 0.95 201,400 896 3.30 C++ g++ #5 1.14 200,660 891 3.98 C++ g++ #9 1.72 135,936 815 4.46 C++ g++ #6 1.88 266,112 851 4.47 C++ g++ #3 1.88 265,600 951 4.72 C++ g++ #8 2.18 265,984 826 5.11 C++ g++ 2.65 2,040,792 760 9.07 C++ g++ #2 21.51 265,856 514 21.51 Python 3 #2 110.47 273,024 344 110.46 Python 3 #4 34.53 277,632 481 126.59 Python 3 #5 35.74 275,456 669 127.53 Python 3 36.16 277,760 597 128.12 Python 3 #3 55.05 672,384 1247 158.56 C++ g++ #4 Make Error C++ g++ Ubuntu 13.2.0-4ubuntu3 Python 3 Python 3.12.2 all C++ g++ programs & measurements all Python 3 programs & measurements