Julia versus C++ g++ 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 Julia #3 8.04 257,756 896 30.44 C++ g++ #5 7.97 19,788 987 31.14 Julia #2 8.40 261,236 1077 31.34 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 Julia 38.89 240,772 441 38.98 C++ g++ 10.59 19,660 1065 41.61 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 Julia #8 4.16 272,512 1129 4.25 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 Julia #4 5.74 252,032 1168 5.83 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 Julia #3 6.53 254,592 1548 6.62 C++ g++ #6 6.89 19,676 1674 6.89 Julia #2 23.73 301,100 1084 23.86 spectral-norm source secs mem gz cpu secs C++ g++ #6 0.72 19,812 1050 2.84 Julia #4 1.18 248,576 435 3.66 Julia #2 1.35 254,032 377 4.06 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 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 Julia #7 1.40 290,176 629 4.79 Julia #8 1.42 289,152 634 4.87 Julia #3 1.50 315,904 589 5.20 Julia #4 1.97 297,984 583 5.22 Julia #5 1.58 310,400 580 5.59 Julia #6 2.09 290,228 571 5.69 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 Julia 26.45 271,104 379 26.53 C++ g++ #3 27.26 19,804 421 27.25 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 Julia #3 1.00 240,640 512 1.13 Julia #2 1.11 247,808 686 1.24 regex-redux source secs mem gz cpu secs C++ g++ #6 1.15 276,276 2856 2.18 Julia #5 1.74 443,844 766 3.05 Julia #4 1.80 448,796 772 3.12 C++ g++ #2 2.84 212,776 706 3.60 C++ g++ 3.62 212,180 662 3.62 Julia #3 2.26 528,768 630 3.77 Julia 3.86 488,864 414 4.05 C++ g++ #5 3.86 215,556 859 4.54 C++ g++ #3 12.41 217,580 859 17.91 C++ g++ #4 Make Error fasta source secs mem gz cpu secs Julia #8 1.10 245,760 1094 1.19 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 Julia #5 2.41 262,528 957 2.50 C++ g++ #3 2.62 19,664 1311 2.62 Julia #4 2.79 249,088 1053 2.88 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 Julia #7 1.80 439,584 1189 4.51 Julia #6 2.05 475,160 1213 4.78 Julia #3 11.04 247,412 901 11.13 C++ g++ #7 Make Error k-nucleotide source secs mem gz cpu secs C++ g++ #2 1.97 156,504 1634 5.87 Julia #8 5.74 441,148 965 13.70 C++ g++ #3 4.19 165,592 1280 13.77 C++ g++ 6.90 757,080 1452 14.68 Julia #7 8.71 430,084 1379 23.62 Julia 132.23 1,967,872 703 131.10 reverse-complement source secs mem gz cpu secs C++ g++ #2 0.70 499,840 2099 0.70 Julia #8 1.58 1,039,672 531 1.70 Julia #9 1.83 1,038,224 456 1.95 C++ g++ #6 3.20 1,517,660 1827 4.22 C++ g++ 6.56 980,060 599 6.56 C++ g++ #5 35.10 771,556 704 35.10 Julia #2 35.46 1,718,176 464 35.82 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 Julia #2 18.15 644,864 430 35.92 Julia #3 14.34 693,600 640 40.22 C++ g++ #4 Make Error Julia #5 Failed Julia #4 Failed Julia julia version 1.10.2 C++ g++ Ubuntu 13.2.0-4ubuntu3 all Julia programs & measurements all C++ g++ programs & measurements