Programming Language and compiler
Benchmarks

C++ VS C# benchmarks

Current benchmark data was generated on Mon May 19 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 4.9ms 2.6MB 1543ms 0ms g++ 11.4.0
cpp 1-im.cpp 402ms 3.2ms 3.9MB 1557ms 0ms clang++ 14.0.0-1ubuntu1.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 41ms 1.6ms 2.5MB 133ms 0ms g++ 11.4.0
cpp 1-im.cpp 42ms 1.5ms 3.9MB 137ms 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 0.0ms 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 7.5ms 2.9ms 9.6MB 0ms 0ms dotnet/aot 9.0.300
csharp 1.cs 32ms 1.0ms 23.9MB 20ms 2ms mono 6.12.0
csharp 1.cs 35ms 0.3ms 26.1MB 20ms 0ms dotnet 9.0.300

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 167ms 0.5ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.2ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 313ms 0.2ms 1.8MB 303ms 0ms g++ 11.4.0
cpp 1.cpp 331ms 25ms 2.3MB 323ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 9.cs 363ms 3.7ms 27.6MB 340ms 7ms dotnet 9.0.300
csharp 8.cs 372ms 0.9ms 9.8MB 360ms 0ms dotnet/aot 9.0.300
csharp 8.cs 423ms 2.3ms 27.6MB 403ms 3ms dotnet 9.0.300
csharp 8.cs 1252ms 5.3ms 22.4MB 1240ms 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 19ms 0.1ms 1.5MB 10ms 0ms g++ 11.4.0
cpp 0-i.cpp 19ms 0.2ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.4ms 1.8MB 30ms 0ms g++ 11.4.0
cpp 1.cpp 34ms 0.3ms 2.3MB 30ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 8.cs 46ms 0.5ms 9.8MB 30ms 0ms dotnet/aot 9.0.300
csharp 9.cs 93ms 1.5ms 27.8MB 73ms 10ms dotnet 9.0.300
csharp 8.cs 95ms 2.7ms 27.6MB 77ms 7ms dotnet 9.0.300
csharp 8.cs 162ms 0.3ms 22.8MB 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 325ms 6.5ms 78.7MB 307ms 3ms dotnet/aot 9.0.300
csharp 1.cs 361ms 8.4ms 96.1MB 333ms 13ms dotnet 9.0.300
csharp 2.cs 394ms 2.3ms 17.5MB 377ms 0ms dotnet/aot 9.0.300
csharp 2.cs 399ms 6.4ms 35.4MB 380ms 7ms dotnet 9.0.300
cpp 1.cpp 494ms 10ms 7.3MB 483ms 0ms g++ 11.4.0
cpp 1.cpp 529ms 1.4ms 7.7MB 520ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 1.cs 560ms 6.0ms 82.0MB 540ms 10ms mono 6.12.0
csharp 2.cs 1908ms 73ms 29.5MB 1887ms 3ms mono 6.12.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 63ms 0.6ms 24.8MB 47ms 0ms dotnet/aot 9.0.300
csharp 1.cs 99ms 2.3ms 42.3MB 77ms 7ms dotnet 9.0.300
csharp 2.cs 102ms 1.9ms 11.9MB 90ms 0ms dotnet/aot 9.0.300
cpp 1.cpp 121ms 1.4ms 3.6MB 110ms 0ms g++ 11.4.0
csharp 2.cs 129ms 0.7ms 29.9MB 113ms 7ms dotnet 9.0.300
cpp 1.cpp 132ms 0.8ms 4.1MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 1.cs 144ms 1.4ms 36.4MB 130ms 3ms mono 6.12.0
csharp 2.cs 494ms 11ms 21.5MB 480ms 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 470ms 2.9ms 3.4MB 1823ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 483ms 0.4ms 2.1MB 1880ms 0ms g++ 11.4.0
cpp 6-im.cpp 925ms 8.4ms 2.3MB 3630ms 0ms g++ 11.4.0
cpp 6-im.cpp 926ms 13ms 3.4MB 3623ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 3-m.cs 1877ms 33ms 10.4MB 7243ms 3ms dotnet/aot 9.0.300
csharp 3-m.cs 1988ms 108ms 30.3MB 7253ms 20ms dotnet 9.0.300
csharp 3-m.cs 4713ms 116ms 24.7MB 18030ms 17ms mono 6.12.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 124ms 0.4ms 3.4MB 460ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 128ms 1.3ms 2.0MB 477ms 0ms g++ 11.4.0
cpp 6-im.cpp 238ms 1.4ms 3.4MB 907ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 253ms 24ms 2.0MB 953ms 0ms g++ 11.4.0
csharp 3-m.cs 475ms 1.5ms 10.5MB 1810ms 0ms dotnet/aot 9.0.300
csharp 3-m.cs 535ms 3.2ms 30.1MB 1887ms 10ms dotnet 9.0.300
csharp 3-m.cs 1236ms 42ms 25.8MB 4650ms 7ms mono 6.12.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 40ms 0.5ms 2.0MB 133ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 7.1ms 3.5MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 65ms 0.5ms 3.5MB 223ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 68ms 1.0ms 2.0MB 243ms 0ms g++ 11.4.0
csharp 3-m.cs 128ms 1.5ms 10.5MB 450ms 0ms dotnet/aot 9.0.300
csharp 3-m.cs 176ms 1.1ms 28.5MB 503ms 10ms dotnet 9.0.300
csharp 3-m.cs 356ms 11ms 25.4MB 1197ms 3ms mono 6.12.0