Chapel 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 C++ g++ #5 7.97 19,788 987 31.14 Chapel #2 8.39 19,772 737 33.40 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 n-body source secs mem gz cpu secs C++ g++ #0 2.14 19,676 1933 2.14 Chapel #3 3.89 19,648 967 3.90 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 Chapel #2 5.65 19,648 977 5.65 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 spectral-norm source secs mem gz cpu secs C++ g++ #6 0.72 19,812 1050 2.84 Chapel #2 0.74 19,648 348 2.89 C++ g++ #5 1.32 19,684 1050 5.25 C++ g++ 5.36 19,684 459 5.36 Chapel 1.47 19,776 322 5.79 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 Chapel #3 1.17 37,760 582 4.64 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 Chapel 6.66 37,632 447 26.42 C++ g++ #3 27.26 19,804 421 27.25 pidigits source secs mem gz cpu secs Chapel #4 0.75 19,648 515 0.76 Chapel #2 0.75 19,776 423 0.76 C++ g++ #5 0.86 19,804 804 0.86 C++ g++ #4 0.88 19,804 521 0.88 regex-redux source secs mem gz cpu secs C++ g++ #6 1.15 276,276 2856 2.18 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 Chapel #3 3.74 552,796 503 4.68 Chapel #2 4.53 552,788 498 5.47 C++ g++ #3 12.41 217,580 859 17.91 C++ g++ #4 Make Error fasta source secs mem gz cpu secs Chapel #6 0.79 19,648 1108 0.80 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 Chapel #5 0.95 19,772 1391 3.47 C++ g++ #6 1.05 19,668 2326 3.85 C++ g++ #5 1.05 19,668 2345 3.88 Chapel #3 4.01 19,772 1219 4.02 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 Chapel #4 4.96 192,256 1071 17.07 Chapel #3 5.86 192,256 1040 20.64 reverse-complement source secs mem gz cpu secs C++ g++ #2 0.70 499,840 2099 0.70 Chapel #8 0.95 1,057,024 1260 2.74 Chapel #3 1.68 1,618,560 709 3.23 Chapel #5 1.79 1,884,928 554 3.30 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 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 Chapel #3 8.69 367,360 494 29.22 C++ g++ #4 Make Error Chapel chpl version 2.0.0 built with LLVM version 17.0.2 Copyright 2020-2024 Hewlett Packard Enterprise Development LP Copyright 2004-2019 Cray Inc. C++ g++ Ubuntu 13.2.0-4ubuntu3 all Chapel programs & measurements all C++ g++ programs & measurements