The Computer Language
25.02 Benchmarks Game

Java versus C#

How the programs are written matters! Always look at the source code.

If the fastest programs are flagged * possible hand-written vector instructions or "unsafe" or naked ffi, 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 cpu secs mem gz make
* C# #5 2.35 9.03 33,559 1485 7.63
C# #2 30.41 30.39 32,924 584 8.13
* C# #9 8.43 33.37 34,038 1232 7.74
C# #6 9.95 39.50—39.54 33,300 1075 7.64
Java #3 40.02 40.12—40.21 62,652 1264 1.69
Java 10.48 42.17—43.29 62,661 1289 1.73
C# #3 11.04 44.49—46.04 33,182 1117 7.89
C# #8 43.84 43.83—43.87 32,858 519 7.51
Java #2 45.41 45.13—51.49 60,027 520 1.68
Java #8 46.66 49.88—55.68 59,994 517 1.65
n-body      
  elapsed Mean or 95% CI      
source secs cpu secs mem gz make
* C# #9 3.20 3.18 32,059 2480 7.92
* C# #4 3.77 3.75 32,215 2137 8.55
* C# #7 4.83 4.81 32,297 1715 7.54
* C# #6 4.85 4.84 32,203 1754 7.89
C# #3 6.68 6.66 33,280 1311 7.62
C# #2 6.92 6.92 33,280 1339 7.93
Java #4 6.92 6.94 60,592 1495 1.65
C# #8 7.24 7.23 32,870 1335 7.70
Java #5 7.34 7.39 61,669 1435 1.78
Java #2 7.51 7.53 60,846 1430 1.71
Java #3 7.52 7.54 61,186 1436 1.65
Java #8 7.61 7.66 60,953 1322 1.67
C# 7.68 7.67 33,341 1424 7.60
C# #0 7.68 7.67 33,300 1342 7.60
Java 7.89 7.91 61,276 1437 1.70
spectral-norm      
  elapsed Mean or 95% CI      
source secs cpu secs mem gz make
* C# #5 0.96 3.44—3.64 37,929 776 8.71
C# #8 5.43 5.41 33,214 441 7.70
Java 5.47 5.51 61,817 521 1.51
Java #8 5.47 5.51 62,308 453 1.72
C# #3 1.56 5.82 36,172 890 8.36
Java #3 1.61 6.01 62,812 762 1.68
Java #2 1.65 6.16—6.20 61,784 956 2.76
C# #2   Empty  
mandelbrot      
  elapsed Mean or 95% CI      
source secs cpu secs mem gz make
* C# #7 3.23 12.59—12.90 73,056 915 7.76
* C# 3.97 15.56—15.67 70,214 1980 10.98
* C# #9 3.95 15.46—15.61 70,402 822 7.95
C# #5 4.08 15.88 68,202 851 11.86
Java #2 4.16 16.30—16.44 101,253 802 1.72
Java #4 4.44 16.15—16.21 124,953 667 1.66
Java #6 4.21 16.67—17.00 100,794 808 1.78
Java 24.54 24.65—24.78 60,711 671 1.81
C# #8 26.42 26.42 33,915 492 7.59
C# #3 6.81 26.76—26.83 66,859 722 7.65
Java #8 27.72 27.85—27.91 63,836 441 1.74
Java #3 7.11 28.81—34.50 101,401 910 1.91
C# #2 47.72 48.00—48.46 33,300 504 7.60
fasta      
  elapsed Mean or 95% CI      
source secs cpu secs mem gz make
C# #9 1.23 1.23 33,571 1512 7.79
Java #4 3.32 3.42 62,726 1528 1.74
Java #6 1.20 3.73 68,055 2549 1.91
Java #5 1.27 3.95—4.17 68,420 2478 1.86
Java #2 4.41 4.64—4.73 65,995 1259 1.75
C# #5 1.53 5.45—5.54 47,833 1702 7.79
C# #8 5.80 5.49 37,343 904 8.59
C# 1.80 6.22—6.38 40,841 2113 7.88
Java #8 10.27 10.94—11.09 202,166 894 1.99
k-nucleotide      
  elapsed Mean or 95% CI      
source secs cpu secs mem gz make
C# 3.26 10.80—11.05 190,829 2046 7.66
C# #6 5.73 15.07—15.28 189,972 1615 7.65
Java 4.94 16.37—17.19 459,260 1821 2.19
Java #3 7.25 25.39—25.58 389,857 1642 2.01
Java #6 7.27 25.30—26.29 389,628 1614 2.19
Java #4 34.38 34.66—36.43 218,042 1887 2.05
C# #4 12.25 43.35—45.07 606,466 1725 7.64
C# #7 42.96 43.57—43.83 557,740 1449 7.50
Java #5 20.48 44.95—46.24 243,007 2225 2.12
C# #8 87.51 79.54—80.86 1,408,664 736 7.89
Java #8 79.72 83.79—87.16 1,484,460 786 2.09
reverse-complement      
  elapsed Mean or 95% CI      
source secs cpu secs mem gz make
C# #9 0.68 1.51 550,793 2641 12.35
C# 3.32 3.31—3.39 666,341 1130 7.59
Java #6 3.20 3.84 2,103,058 760 1.69
C# #5 2.59 3.87 1,056,952 1620 7.47
C# #6 1.75 4.03—4.07 1,058,517 1627 7.69
C# #7 1.69 4.47—4.62 967,602 1312 11.98
Java #5 4.81 4.93—5.10 1,143,575 1115 1.66
Java #4 5.73 5.87—5.94 1,958,097 656 1.58
C# #3 8.65 13.47—13.71 1,266,110 934 8.01
Java #7   Bad Output  
Java #3   Bad Output  
binary-trees      [ Contentious. Different approaches. ]
  elapsed Mean or 95% CI      
source secs cpu secs mem gz make
Java #4 4.45 5.56—5.91 1,804,603 846 2.63
Java #6 4.91 5.73—5.77 1,792,643 535 1.59
Java #3 4.92 5.73—5.85 1,733,562 546 1.55
Java #2 5.05 5.84—5.91 1,792,967 558 1.78
Java #7 2.62 8.09—8.18 1,778,696 841 1.88
C# #2 6.47 18.08—18.35 1,107,055 717 7.59
C# #7 6.40 18.01—18.41 1,053,831 706 7.48
C# 7.20 20.10—20.51 3,005,301 668 8.11
C# #3 7.42 20.59—21.11 3,014,975 688 7.55
C# #6   Empty  
pidigits      [ Contentious. Different libraries. ]
  elapsed Mean or 95% CI      
source secs cpu secs mem gz make
* C# #6 0.84 0.82 34,796 1182 7.91
* Java #3 0.84 0.86 60,424 770 1.73
* C# #5 0.86 0.89 37,335 990 7.47
Java #4 1.05 1.27 78,606 733 3.62
* C# #4 1.31 1.30 35,496 1135 7.69
* Java #2 1.34 1.41 65,090 944 1.71
C# #7 11.08 9.19—10.76 44,098 579 7.80
Java 7.72 8.78—8.83 453,767 807 1.56
regex-redux      [ Contentious. Different libraries. ]
  elapsed Mean or 95% CI      
source secs cpu secs mem gz make
C# #2 1.43 2.64 402,747 1881 7.54
Java #2 1.60 3.19 386,425 2201 3.75
C# 4.63 4.83 618,988 641 7.95
C# #5 1.90 5.18—5.38 632,472 679 7.53
Java 8.45 16.81—16.98 533,582 875 1.81
Java #6 5.61 17.10—17.43 1,287,463 746 1.82
Java #3 5.30 17.04—17.22 636,994 935 1.82
C# #4 8.59 30.62—33.76 882,033 854 7.44
Java

java 23 2024-09-17
Java HotSpot(TM) 64-Bit Server VM
(build 23+37-2369,
mixed mode, sharing)

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