The Computer Language
25.02 Benchmarks Game

C++ g++ versus C#

How the programs are written matters! 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
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
* C# #5 2.35 33,559 1485 7.63 9.03
* C++ g++ #6 3.33 5,800 1535 4.64 13.12
* C++ g++ #7 14.06 2,449 1156 2.95 14.04—14.11
C# #2 30.41 32,924 584 8.13 30.39
C++ g++ #5 7.86 5,792 987 3.67 30.73—30.82
* C# #9 8.43 34,038 1232 7.74 33.37
C++ g++ #4 8.91 5,710 1445 12.14 34.99—35.47
C++ g++ #2 9.14 5,698 1446 11.86 35.88—36.26
C++ g++ #3 37.89 2,351 600 2.70 37.90—37.99
C# #6 9.95 33,300 1075 7.64 39.50—39.54
C++ g++ 10.53 5,534 1065 3.88 41.25—41.55
C# #3 11.04 33,182 1117 7.89 44.49—46.04
C# #8 43.84 32,858 519 7.51 43.83—43.87
n-body
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
* C++ g++ #0 2.15 2,417 1933 3.66 2.16
* C# #9 3.20 32,059 2480 7.92 3.18
* C# #4 3.77 32,215 2137 8.55 3.75
* C++ g++ #7 4.09 5,124 1815 4.18 4.12—4.17
* C# #7 4.83 32,297 1715 7.54 4.81
* C# #6 4.85 32,203 1754 7.89 4.84
C++ g++ #9 5.15 2,486 1536 3.03 5.17
C++ g++ #3 5.33 2,482 1402 2.85 5.34
* C++ g++ #4 5.46 2,482 1434 2.83 5.46
* C++ g++ #2 6.02 2,490 1524 3.04 6.02—6.10
C++ g++ #5 6.33 2,478 1544 2.92 6.35
C++ g++ 6.62 2,499 1666 3.15 6.64
C# #3 6.68 33,280 1311 7.62 6.66
C# #2 6.92 33,280 1339 7.93 6.92
C++ g++ #6 6.94 2,499 1674 2.98 6.93—6.98
C# #8 7.24 32,870 1335 7.70 7.23
C# 7.68 33,341 1424 7.60 7.67
C# #0 7.68 33,300 1342 7.60 7.67
spectral-norm
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
* C++ g++ #6 0.72 3,981 1050 3.08 2.86
* C# #5 0.96 37,929 776 8.71 3.44—3.64
* C++ g++ #5 1.33 5,820 1050 2.86 5.28
C++ g++ 5.34 5,292 459 3.75 5.34
C# #8 5.43 33,214 441 7.70 5.41
C# #3 1.56 36,172 890 8.36 5.82
C++ g++ #7 1.53 4,071 1284 2.71 6.07
C# #2   Empty  
mandelbrot
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
* C++ g++ #4 0.89 37,941 3554 5.04 3.46
* C++ g++ 0.90 37,626 1797 3.59 3.48
* C++ g++ #6 0.98 37,908 1014 4.36 3.87
C++ g++ #0 2.36 38,281 2752 4.60 9.31
* C# #7 3.23 73,056 915 7.76 12.59—12.90
* C++ g++ #7 4.87 38,048 749 3.03 13.30
C++ g++ #5 13.47 36,884 596 2.76 13.49
C++ g++ #9 3.53 37,863 732 3.03 13.59
* C# 3.97 70,214 1980 10.98 15.56—15.67
* C# #9 3.95 70,402 822 7.95 15.46—15.61
C# #5 4.08 68,202 851 11.86 15.88
C++ g++ #2 16.96 36,704 700 3.28 16.96
C# #8 26.42 33,915 492 7.59 26.42
C# #3 6.81 66,859 722 7.65 26.76—26.83
C++ g++ #3 27.38 5,181 421 3.69 27.38
C# #2 47.72 33,300 504 7.60 48.00—48.46
fasta
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
C# #9 1.23 33,571 1512 7.79 1.23
C++ g++ #9 0.78 6,214 2758 6.43 1.56
C++ g++ #2 1.85 5,108 1129 2.89 1.85
C++ g++ 1.93 5,104 1064 2.98 1.93
C++ g++ #3 2.63 5,284 1311 3.33 2.63
C++ g++ #7 0.88 6,304 2711 4.58 3.06
C++ g++ #4 3.34 2,363 1291 3.03 3.34
C++ g++ #5 1.07 7,012 2345 3.90 3.69—3.73
C++ g++ #6 1.08 7,127 2326 3.72 3.90
C# #5 1.53 47,833 1702 7.79 5.45—5.54
C# #8 5.80 37,343 904 8.59 5.49
C# 1.80 40,841 2113 7.88 6.22—6.38
k-nucleotide
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
C++ g++ #2 2.02 162,349 1634 7.41 6.05—6.54
C# 3.26 190,829 2046 7.66 10.80—11.05
C++ g++ #3 4.19 171,622 1280 5.17 13.83—14.44
C++ g++ 7.04 778,510 1452 6.55 15.17—15.69
C# #6 5.73 189,972 1615 7.65 15.07—15.28
C# #4 12.25 606,466 1725 7.64 43.35—45.07
C# #7 42.96 557,740 1449 7.50 43.57—43.83
C# #8 87.51 1,408,664 736 7.89 79.54—80.86
reverse-complement
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
* C++ g++ #2 0.76 514,101 2099 4.30 0.76
C# #9 0.68 550,793 2641 12.35 1.51
C# 3.32 666,341 1130 7.59 3.31—3.39
C# #5 2.59 1,056,952 1620 7.47 3.87
C# #6 1.75 1,058,517 1627 7.69 4.03—4.07
C# #7 1.69 967,602 1312 11.98 4.47—4.62
C++ g++ 6.55 1,006,805 599 3.43 6.55—6.68
C# #3 8.65 1,266,110 934 8.01 13.47—13.71
C++ g++ #5 37.66 792,846 704 3.40 37.65—37.69
C++ g++ #6   Bad Output  
C++ g++ #3   Bad Output  
binary-trees
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
C++ g++ #7 1.01 175,108 896 7.50 3.46—3.62
C++ g++ #5 1.17 208,171 891 3.87 4.12—4.17
C++ g++ #9 1.76 140,571 815 4.05 4.66—4.82
C++ g++ #6 1.93 273,973 851 4.98 4.90—5.09
C++ g++ #3 2.28 273,715 951 4.79 5.06—5.10
C++ g++ #4 2.22 273,977 826 5.16 5.20—5.33
C++ g++ 2.69 1,896,727 760 5.34 9.43—9.52
C# #8 16.51 859,582 601 10.54 16.72—16.91
C# #2 6.47 1,107,055 717 7.59 18.08—18.35
C# #7 6.40 1,053,831 706 7.48 18.01—18.41
C# 7.20 3,005,301 668 8.11 20.10—20.51
C# #3 7.42 3,014,975 688 7.55 20.59—21.11
C++ g++ #2 22.77 274,080 514 3.52 22.81—23.05
C# #6   Empty  
pidigits
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
C++ g++ #4 0.72 6,496 521 3.45 0.72
* C++ g++ #5 0.73 6,300 804 3.34 0.73
* C# #6 0.84 34,796 1182 7.91 0.82
* C# #5 0.86 37,335 990 7.47 0.89
* C# #4 1.31 35,496 1135 7.69 1.30
C# #7 11.08 44,098 579 7.80 9.19—10.76
regex-redux
  elapsed       Mean or 95% CI
source secs mem gz make cpu secs
C++ g++ #6 1.14 285,639 2856 5.06 2.25
C# #2 1.43 402,747 1881 7.54 2.64
C# 4.63 618,988 641 7.95 4.83
C# #5 1.90 632,472 679 7.53 5.18—5.38
C++ g++ #3 12.37 222,614 859 12.29 18.03—18.68
C# #4 8.59 882,033 854 7.44 30.62—33.76
C++ g++   Empty  
C++ g++ #2   Empty  
C++ g++ #5   Empty  
C++ g++ #4   Empty  
C++ g++

g++ (Ubuntu 14.2.0-4ubuntu2) 14.2.0

C#

.NET SDK 9.0.100
Host Version: 9.0.0
Commit: 9d5a6a9aa4

<OutputType>Exe
<TargetFramework>net9.0
<ImplicitUsings>enable
<Nullable>enable
<AllowUnsafeBlocks>true
<ServerGarbageCollection>true
<ConcurrentGarbageCollection>true
<PublishAot>false