The Computer Language
23.03 Benchmarks Game

C# .NET versus Java 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# .NET #8 2.14 30,496 1473 8.33
C# .NET #9 8.06 31,844 1225 31.90
C# .NET #6 9.16 30,572 1068 36.34
Java #3 40.36 39,932 1257 40.43
Java 10.71 40,324 1282 42.25
Java #2 46.85 38,492 514 46.91
C# .NET #7   Bad Output  
n-body
source secs mem gz cpu secs
C# .NET #9 3.14 30,200 2467 3.13
C# .NET #4 3.78 30,120 2125 3.76
C# .NET #7 4.79 30,184 1704 4.78
C# .NET #6 4.81 30,192 1742 4.80
Java #5 6.77 40,632 1429 6.82
C# .NET #3 6.89 30,564 1305 6.87
Java #4 6.86 40,516 1489 6.89
C# .NET #8 7.13 30,596 1332 7.12
C# .NET #2 7.14 30,532 1343 7.12
Java #2 7.32 40,508 1424 7.37
Java #3 7.38 40,492 1430 7.43
Java 7.76 40,724 1430 7.80
spectral-norm
source secs mem gz cpu secs
C# .NET #5 0.90 34,704 764 3.27
C# .NET #3 1.54 32,804 878 5.84
Java #3 1.54 42,324 756 5.93
Java 7.02 41,448 514 7.09
Java #2 2.39 41,092 950 9.25
mandelbrot
source secs mem gz cpu secs
C# .NET 3.17 65,512 1974 12.37
C# .NET #9 3.17 65,492 816 12.37
Java #4 4.39 101,236 660 16.12
C# .NET #5 4.12 63,172 839 16.13
Java #2 4.11 83,924 796 16.21
Java #6 4.27 84,532 802 16.86
Java 25.66 40,860 665 25.73
Java #3 7.37 88,056 903 29.24
pidigits
source secs mem gz cpu secs
C# .NET #6 0.94 31,888 1168 0.92
C# .NET #5 0.93 33,596 977 0.94
Java #3 0.92 38,380 764 0.95
C# .NET #4 1.35 31,700 1121 1.34
Java #2 1.34 41,352 938 1.42
C# .NET #7 6.72 53,020 567 7.28
Java 7.44 430,616 800 8.45
regex-redux
source secs mem gz cpu secs
C# .NET #8 1.44 389,260 1869 2.67
C# .NET #5 2.50 1,056,900 673 5.81
Java 8.58 767,552 868 16.68
Java #6 5.40 637,728 740 17.08
Java #3 5.45 736,544 929 17.42
fasta
source secs mem gz cpu secs
Java #4 3.17 40,400 1524 3.27
Java #6 1.16 46,068 2543 3.65
Java #5 1.23 46,180 2473 3.79
Java #2 4.32 44,708 1257 4.45
C# .NET #5 1.49 52,708 1691 5.45
C# .NET 1.57 51,912 2098 5.78
k-nucleotide
source secs mem gz cpu secs
C# .NET 3.60 184,024 2044 11.81
C# .NET #6 5.98 190,172 1603 15.84
Java 5.03 361,196 1812 16.40
Java #6 7.17 357,700 1607 25.04
Java #3 7.12 357,568 1635 25.06
Java #4 35.38 201,052 1882 35.83
Java #5 18.82 208,376 2219 40.84
reverse-complement
source secs mem gz cpu secs
C# .NET #8 0.55 926,208 2637 1.26
Java #6 3.02 2,027,152 752 3.69
C# .NET #5 2.81 1,025,440 1613 3.76
C# .NET #6 1.58 1,026,664 1621 3.78
Java #5 4.46 1,094,060 1108 4.58
C# .NET #7 1.92 954,396 1310 5.06
Java #4 5.51 1,886,052 651 5.62
Java #7 24.15 1,032,956 1647 6.20
Java #3   Bad Output  
Java #8   Bad Output  
binary-trees
source secs mem gz cpu secs
Java #4 4.47 2,116,292 840 5.15
Java #6 4.88 2,058,280 529 5.59
Java #3 4.91 2,101,240 540 5.61
Java #2 5.05 2,095,888 552 5.73
Java #7 2.52 1,726,148 835 7.89
C# .NET #7 4.83 1,605,316 694 15.63
C# .NET #2 4.90 1,757,904 705 15.94
C# .NET #3 5.25 2,092,160 676 16.83
C# .NET 5.28 2,145,644 657 17.22
C# .NET

.NET SDK 7.0.200
Host Version: 7.0.3
Commit: 0a2bda10e8
<ServerGarbageCollection>true

Java

openjdk 20 2023-03-21
OpenJDK Runtime Environment
(build 20+36-2344)
OpenJDK 64-Bit Server VM
(build build 20+36-2344
mixed mode, sharing)