Programming Language and compiler
Benchmarks

C++ VS C# benchmarks

Current benchmark data was generated on Mon Mar 31 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 395ms 1.4ms 2.6MB 1530ms 0ms g++ 11.4.0
cpp 1-im.cpp 401ms 9.4ms 3.9MB 1550ms 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 1.0ms 3.9MB 130ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1-im.cpp 43ms 4.4ms 2.4MB 137ms 0ms g++ 11.4.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.1ms 0.1ms 1.4MB 0ms 0ms g++ 11.4.0
cpp 1.cpp 1.4ms 0.1ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 1.cs 7.6ms 2.7ms 9.6MB 0ms 0ms dotnet/aot 9.0.202
csharp 1.cs 32ms 0.6ms 21.3MB 20ms 0ms mono 6.12.0
csharp 1.cs 45ms 3.1ms 26.3MB 22ms 8ms dotnet 9.0.202

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 0.4ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 314ms 0.9ms 1.8MB 307ms 0ms g++ 11.4.0
cpp 1.cpp 316ms 1.6ms 2.3MB 310ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 9.cs 358ms 2.8ms 27.6MB 340ms 10ms dotnet 9.0.202
csharp 8.cs 376ms 6.6ms 9.8MB 363ms 0ms dotnet/aot 9.0.202
csharp 8.cs 419ms 3.2ms 27.5MB 400ms 7ms dotnet 9.0.202
csharp 8.cs 1245ms 4.0ms 22.1MB 1227ms 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 0.0ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.5ms 2.3MB 27ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.9ms 1.8MB 30ms 0ms g++ 11.4.0
csharp 8.cs 45ms 1.0ms 9.9MB 30ms 0ms dotnet/aot 9.0.202
csharp 9.cs 93ms 3.1ms 27.9MB 73ms 7ms dotnet 9.0.202
csharp 8.cs 93ms 2.6ms 27.5MB 73ms 7ms dotnet 9.0.202
csharp 8.cs 161ms 1.5ms 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 292ms 3.4ms 78.8MB 270ms 10ms dotnet/aot 9.0.202
csharp 1.cs 323ms 2.9ms 96.2MB 300ms 13ms dotnet 9.0.202
csharp 2.cs 392ms 2.6ms 35.6MB 370ms 10ms dotnet 9.0.202
csharp 2.cs 423ms 4.5ms 17.6MB 410ms 0ms dotnet/aot 9.0.202
cpp 1.cpp 481ms 2.1ms 7.3MB 470ms 0ms g++ 11.4.0
cpp 1.cpp 527ms 0.7ms 7.7MB 517ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 1.cs 533ms 6.3ms 84.0MB 513ms 7ms mono 6.12.0
csharp 2.cs 1870ms 2.9ms 29.8MB 1853ms 0ms mono 6.12.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 64ms 1.5ms 25.1MB 50ms 3ms dotnet/aot 9.0.202
csharp 1.cs 100ms 4.1ms 42.5MB 80ms 10ms dotnet 9.0.202
csharp 2.cs 106ms 0.6ms 12.0MB 97ms 0ms dotnet/aot 9.0.202
cpp 1.cpp 119ms 0.6ms 3.6MB 110ms 0ms g++ 11.4.0
csharp 2.cs 127ms 5.4ms 30.0MB 103ms 10ms dotnet 9.0.202
cpp 1.cpp 131ms 0.7ms 4.1MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 1.cs 144ms 2.3ms 38.3MB 130ms 0ms mono 6.12.0
csharp 2.cs 484ms 8.9ms 21.1MB 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 0.5ms 3.5MB 1817ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 492ms 15ms 2.1MB 1897ms 0ms g++ 11.4.0
cpp 6-im.cpp 921ms 2.1ms 3.4MB 3610ms 3ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 922ms 0.6ms 2.1MB 3630ms 0ms g++ 11.4.0
csharp 3-m.cs 1841ms 7.6ms 10.5MB 7173ms 10ms dotnet/aot 9.0.202
csharp 3-m.cs 1930ms 5.0ms 30.1MB 7370ms 13ms dotnet 9.0.202
csharp 3-m.cs 4705ms 144ms 25.6MB 17887ms 20ms mono 6.12.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 125ms 0.9ms 3.4MB 453ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 129ms 1.9ms 2.0MB 483ms 0ms g++ 11.4.0
cpp 6-im.cpp 240ms 2.2ms 2.0MB 923ms 0ms g++ 11.4.0
cpp 6-im.cpp 244ms 7.1ms 3.4MB 920ms 0ms clang++ 14.0.0-1ubuntu1.1
csharp 3-m.cs 492ms 25ms 10.5MB 1780ms 7ms dotnet/aot 9.0.202
csharp 3-m.cs 652ms 40ms 29.8MB 1707ms 13ms dotnet 9.0.202
csharp 3-m.cs 1237ms 39ms 27.5MB 4640ms 13ms 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 0.9ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 41ms 5.0ms 3.4MB 117ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 66ms 0.6ms 3.4MB 227ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 68ms 1.1ms 2.0MB 243ms 0ms g++ 11.4.0
csharp 3-m.cs 126ms 1.2ms 10.4MB 443ms 0ms dotnet/aot 9.0.202
csharp 3-m.cs 251ms 4.1ms 28.6MB 460ms 13ms dotnet 9.0.202
csharp 3-m.cs 348ms 0.4ms 25.2MB 1173ms 13ms mono 6.12.0