The Computer Language
22.05 Benchmarks Game

Fastest cpu secs Swift 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++ g++ #6 2,000 1528 12.93
C++ g++ #7 992 1150 13.89
C++ g++ #5 2,000 980 29.40
Swift #3 6,644 1097 31.59
Swift 6,456 451 35.27
C++ g++ #4 2,216 1439 40.52
C++ g++ #3 988 593 40.55
C++ g++ #2 2,224 1440 42.64
C++ g++ 2,164 1059 42.76
n-body
source mem gz cpu
C++ g++ #0 964 1927 2.17
C++ g++ #2 1,944 1879 4.06
C++ g++ #7 1,976 1808 4.28
C++ g++ #9 1,260 1530 4.90
Swift #4 14,076 1355 5.28
Swift #5 10,800 1365 5.29
Swift #7 14,024 1326 5.33
C++ g++ #6 1,300 1668 5.65
C++ g++ #4 1,040 1428 5.68
Swift #8 14,028 1681 5.70
C++ g++ #3 1,280 1396 5.74
C++ g++ 1,260 1659 5.93
C++ g++ #8 1,220 1517 6.08
Swift #6 6,356 1194 6.11
C++ g++ #5 1,944 1749 6.11
Swift #3 6,452 1204 8.11
Swift #2 6,420 1192 8.68
Swift #9 14,032 1526 292.55
spectral-norm
source mem gz cpu
C++ g++ #6 1,348 1044 2.85
C++ g++ #5 2,048 1044 5.26
Swift 12,872 438 5.32
C++ g++ 1,964 452 5.36
Swift #3 6,876 601 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
Swift #7 41,804 1140 5.29
Swift #6 44,504 1141 5.43
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++ g++ #7 34,392 1017 13.92
C++ g++ #2 34,176 692 17.47
Swift 6,484 394 26.22
Swift #5 41,620 659 26.91
C++ g++ #3 1,976 414 28.53
Swift #3   Bad Output  
pidigits
source mem gz cpu
C++ g++ #4 4,220 513 0.71
C++ g++ #5 4,284 798 0.72
Swift #2 8,132 600 0.74
regex-redux
source mem gz cpu
C++ g++ #6 275,924 2850 2.20
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
Swift #2 682,836 671 43.47
Swift 879,156 715 44.12
Swift #4 1,061,888 745 45.38
fasta
source mem gz cpu
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
Swift #2 7,440 1945 3.17
C++ g++ #4 1,016 1287 3.36
C++ g++ #5 4,540 2344 3.75
C++ g++ #6 4,564 2324 3.89
Swift 6,908 1526 4.52
Swift #3 26,916 2090 4.64
C++ g++ #7   Make Error  
k-nucleotide
source mem gz cpu
C++ g++ #2 156,416 1631 5.92
C++ g++ #3 165,588 1276 14.14
C++ g++ 756,320 1446 14.54
Swift #2 257,052 1367 52.46
Swift   Make Error  
reverse-complement
source mem gz cpu
C++ g++ #2 499,708 2093 0.64
Swift 794,484 1286 2.26
C++ g++ #3 500,008 840 2.62
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++ g++ #3 265,220 945 4.65
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++ g++ #2 265,180 508 22.61
Swift #5 733,388 806 41.37
Swift #3 700,092 862 43.45
Swift #2 699,876 816 44.09
Swift 733,908 714 59.11
Swift #4 700,512 765 60.93
Swift #9   Make Error  
C++ g++ #4   Make Error  
Swift

Swift version 5.7-dev
(LLVM a177fc627109410,
Swift 31967c6df177cce)

C++ g++

11.2.0-19ubuntu1