Programming Language and compiler
Benchmarks

C++ VS C# benchmarks

Current benchmark data was generated on Fri Aug 01 2025, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][4 cores] AMD EPYC 7763 64-Core Processor (Model 1)

* -m in a file name stands for multi-threading or multi-processing

* -i in a file name stands for direct intrinsics usage. (Usage of simd intrinsics via libraries is not counted)

* -ffi in a file name stands for non-stdlib FFI usage

* (You may find time < time(user) + time(sys) for some non-parallelized programs, the overhead is from GC or JIT compiler, which are allowed to take advantage of multi-cores as that's more close to real-world scenarios.)

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 401ms 5.2ms 3.9MB 1553ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 402ms 3.8ms 2.6MB 1547ms 0ms g++ 11.4.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 39ms 1.2ms 2.5MB 127ms 0ms g++ 11.4.0
cpp 1-im.cpp 40ms 1.1ms 3.9MB 133ms 0ms clang++ 14.0.0-1ubuntu1.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.0ms 0.1ms 1.4MB 0ms 0ms g++ 11.4.0
cpp 1.cpp 1.3ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 1.cs 6.8ms 2.0ms 9.5MB 0ms 0ms dotnet/aot 9.0.303
csharp 1.cs 30ms 1.2ms 21.3MB 20ms 0ms mono 6.12.0
csharp 1.cs 35ms 0.9ms 26.1MB 20ms 4ms dotnet 9.0.303

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 167ms 0.3ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.3ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 315ms 1.4ms 2.3MB 307ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 316ms 0.7ms 1.9MB 307ms 0ms g++ 11.4.0
csharp 9.cs 360ms 0.9ms 27.9MB 340ms 7ms dotnet 9.0.303
csharp 8.cs 370ms 0.9ms 9.9MB 357ms 0ms dotnet/aot 9.0.303
csharp 8.cs 420ms 3.5ms 27.6MB 400ms 7ms dotnet 9.0.303
csharp 8.cs 1246ms 2.5ms 22.8MB 1230ms 0ms mono 6.12.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 18ms 0.1ms 1.5MB 10ms 0ms g++ 11.4.0
cpp 0-i.cpp 19ms 0.1ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 33ms 0.1ms 1.8MB 23ms 0ms g++ 11.4.0
cpp 1.cpp 33ms 0.1ms 2.3MB 30ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 8.cs 46ms 1.3ms 9.9MB 33ms 0ms dotnet/aot 9.0.303
csharp 9.cs 93ms 5.0ms 27.8MB 73ms 7ms dotnet 9.0.303
csharp 8.cs 94ms 2.2ms 27.6MB 77ms 3ms dotnet 9.0.303
csharp 8.cs 162ms 3.6ms 22.9MB 150ms 0ms mono 6.12.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 304ms 2.9ms 78.8MB 283ms 7ms dotnet/aot 9.0.303
csharp 1.cs 335ms 11ms 96.1MB 310ms 17ms dotnet 9.0.303
csharp 2.cs 395ms 5.1ms 35.8MB 370ms 10ms dotnet 9.0.303
csharp 2.cs 425ms 3.3ms 17.5MB 410ms 0ms dotnet/aot 9.0.303
cpp 1.cpp 485ms 0.9ms 7.3MB 470ms 0ms g++ 11.4.0
cpp 1.cpp 531ms 2.8ms 7.8MB 520ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 1.cs 535ms 4.1ms 84.0MB 517ms 7ms mono 6.12.0
csharp 2.cs 1862ms 5.9ms 27.5MB 1843ms 3ms mono 6.12.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 66ms 2.7ms 24.9MB 50ms 0ms dotnet/aot 9.0.303
csharp 1.cs 98ms 1.4ms 42.5MB 80ms 10ms dotnet 9.0.303
csharp 2.cs 108ms 1.0ms 11.8MB 97ms 0ms dotnet/aot 9.0.303
cpp 1.cpp 121ms 1.9ms 3.6MB 110ms 0ms g++ 11.4.0
csharp 2.cs 131ms 1.6ms 30.0MB 110ms 10ms dotnet 9.0.303
cpp 1.cpp 131ms 1.3ms 4.1MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 1.cs 142ms 0.4ms 38.0MB 127ms 0ms mono 6.12.0
csharp 2.cs 480ms 1.2ms 23.0MB 470ms 0ms mono 6.12.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 469ms 3.9ms 3.4MB 1827ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 482ms 1.0ms 2.4MB 1887ms 0ms g++ 11.4.0
cpp 6-im.cpp 926ms 10ms 2.3MB 3637ms 0ms g++ 11.4.0
cpp 6-im.cpp 935ms 18ms 3.4MB 3647ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 3-m.cs 1885ms 25ms 10.5MB 7280ms 0ms dotnet/aot 9.0.303
csharp 3-m.cs 1919ms 3.3ms 30.1MB 7350ms 23ms dotnet 9.0.303
csharp 3-m.cs 4704ms 149ms 25.7MB 17910ms 13ms mono 6.12.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 123ms 0.7ms 3.4MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 0.6ms 2.0MB 483ms 0ms g++ 11.4.0
cpp 6-im.cpp 237ms 1.4ms 3.4MB 903ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 239ms 2.4ms 2.0MB 913ms 0ms g++ 11.4.0
csharp 3-m.cs 479ms 1.1ms 10.4MB 1817ms 0ms dotnet/aot 9.0.303
csharp 3-m.cs 534ms 3.5ms 30.0MB 1880ms 17ms dotnet 9.0.303
csharp 3-m.cs 1244ms 39ms 25.7MB 4693ms 10ms mono 6.12.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 37ms 1.4ms 3.4MB 110ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 39ms 0.4ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 6-im.cpp 64ms 0.1ms 3.4MB 227ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 66ms 0.6ms 2.1MB 237ms 0ms g++ 11.4.0
csharp 3-m.cs 128ms 0.6ms 10.6MB 453ms 0ms dotnet/aot 9.0.303
csharp 3-m.cs 180ms 5.3ms 28.5MB 503ms 7ms dotnet 9.0.303
csharp 3-m.cs 347ms 1.9ms 25.4MB 1170ms 7ms mono 6.12.0