Programming Language and compiler
Benchmarks

Results for 38 of 40 languages from this run on actest1.

Unavailable in this run: Hack, Lisp. Follow the run link for failure details.

C# VS C++ benchmarks

Current benchmark data was generated on Sun Sep 27 2026, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][4 cores] Intel(R) Core(TM) i7-3687U CPU @ 2.10GHz (Model 58)

* -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.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 1295ms 11ms 187.1MB 1320ms 160ms dotnet 9.0.318

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 287ms 27ms 55.0MB 213ms 33ms dotnet 9.0.318

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1-m.cs 3524ms 240ms 77.2MB 12327ms 143ms dotnet 9.0.318

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1-m.cs 433ms 30ms 41.3MB 1257ms 27ms dotnet 9.0.318

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 8169ms 4.7ms 39.1MB 8167ms 20ms dotnet 9.0.318

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 1436ms 18ms 36.0MB 1407ms 10ms dotnet 9.0.318

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5-m.cs 228ms 1.4ms 45.9MB 590ms 100ms dotnet 9.0.318

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5-m.cs 89ms 8.4ms 41.0MB 130ms 10ms dotnet 9.0.318

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.1ms 0.2ms 1.5MB 0ms 0ms g++ 13.3.0
cpp 1.cpp 1.7ms 0.3ms 1.5MB 0ms 0ms clang++ 18.1.3
csharp 1.cs 46ms 3.5ms 24.6MB 30ms 2ms dotnet 9.0.318

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2-http2.cs 821ms 13ms 108.9MB 1357ms 167ms dotnet 9.0.318
csharp 2-m.cs 1078ms 79ms 166.0MB 1467ms 757ms dotnet 9.0.318
csharp 1-m.cs 1153ms 50ms 167.4MB 1897ms 800ms dotnet 9.0.318
csharp 2-http3.cs 1186ms 29ms 170.6MB 2087ms 340ms dotnet 9.0.318

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 608ms 17ms 87.8MB 637ms 177ms dotnet 9.0.318
csharp 1-m.cs 656ms 17ms 100.2MB 873ms 230ms dotnet 9.0.318
csharp 2-http2.cs 679ms 17ms 90.2MB 780ms 113ms dotnet 9.0.318
csharp 2-http3.cs 868ms 13ms 100.2MB 1010ms 147ms dotnet 9.0.318

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 503ms 28ms 73.7MB 480ms 30ms dotnet 9.0.318
csharp 1.cs 1142ms 104ms 145.0MB 1297ms 93ms dotnet 9.0.318

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 2313ms 114ms 247.2MB 2667ms 93ms dotnet 9.0.318
csharp 1-m.cs 3652ms 36ms 762.3MB 5157ms 397ms dotnet 9.0.318

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 6-m.cs 1157ms 42ms 72.1MB 2957ms 37ms dotnet 9.0.318

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 6-m.cs 289ms 10ms 58.9MB 450ms 33ms dotnet 9.0.318

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 293ms 15ms 32.0MB 273ms 13ms dotnet 9.0.318
csharp 1.cs 2152ms 98ms 36.0MB 2140ms 20ms dotnet 9.0.318

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 484ms 2.4ms 29.8MB 463ms 13ms dotnet 9.0.318
csharp 1.cs 6072ms 312ms 36.0MB 6053ms 30ms dotnet 9.0.318

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 203ms 0.2ms 31.9MB 180ms 10ms dotnet 9.0.318
csharp 1.cs 4300ms 12ms 33.1MB 4280ms 20ms dotnet 9.0.318

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 4.cs 1297ms 11ms 38.9MB 1273ms 10ms dotnet 9.0.318
csharp 2.cs 1353ms 3.1ms 40.1MB 1333ms 13ms dotnet 9.0.318
csharp 3.cs 3774ms 86ms 39.8MB 3747ms 10ms dotnet 9.0.318
csharp 1.cs 3878ms 86ms 39.6MB 3857ms 7ms dotnet 9.0.318

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 4.cs 177ms 2.6ms 35.9MB 153ms 17ms dotnet 9.0.318
csharp 1.cs 231ms 2.8ms 34.9MB 207ms 10ms dotnet 9.0.318
csharp 3.cs 268ms 2.2ms 34.6MB 237ms 20ms dotnet 9.0.318
csharp 2.cs 295ms 8.0ms 37.0MB 277ms 7ms dotnet 9.0.318

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 904ms 34ms 135.4MB 880ms 93ms dotnet 9.0.318
csharp 1.cs 1035ms 40ms 163.4MB 1010ms 123ms dotnet 9.0.318

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 304ms 5.8ms 74.7MB 257ms 57ms dotnet 9.0.318
csharp 1.cs 337ms 4.6ms 93.7MB 303ms 57ms dotnet 9.0.318

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 219ms 0.7ms 1.0MB 210ms 0ms g++ 13.3.0
cpp 0-i.cpp 225ms 20ms 1.6MB 217ms 0ms clang++ 18.1.3
cpp 1.cpp 387ms 4.1ms 1.6MB 377ms 0ms clang++ 18.1.3
cpp 1.cpp 734ms 2.2ms 1.1MB 723ms 0ms g++ 13.3.0
csharp 8.cs 783ms 1.5ms 29.6MB 760ms 10ms dotnet 9.0.318
csharp 9.cs 997ms 4.7ms 29.6MB 967ms 17ms dotnet 9.0.318

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 24ms 1.0ms 1.6MB 13ms 0ms clang++ 18.1.3
cpp 0-i.cpp 24ms 0.2ms 1.1MB 10ms 0ms g++ 13.3.0
cpp 1.cpp 42ms 0.7ms 1.5MB 30ms 0ms clang++ 18.1.3
cpp 1.cpp 77ms 0.2ms 1.1MB 70ms 0ms g++ 13.3.0
csharp 8.cs 159ms 7.2ms 30.1MB 140ms 3ms dotnet 9.0.318
csharp 9.cs 228ms 3.1ms 29.9MB 203ms 10ms dotnet 9.0.318

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 796ms 7.4ms 7.5MB 780ms 0ms clang++ 18.1.3
csharp 2.cs 819ms 3.8ms 33.5MB 797ms 13ms dotnet 9.0.318
cpp 1.cpp 847ms 19ms 7.1MB 833ms 0ms g++ 13.3.0
csharp 1.cs 1042ms 3.6ms 96.6MB 1020ms 13ms dotnet 9.0.318

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 160ms 1.7ms 4.1MB 150ms 0ms clang++ 18.1.3
cpp 1.cpp 171ms 8.0ms 3.6MB 160ms 0ms g++ 13.3.0
csharp 2.cs 205ms 0.9ms 32.5MB 183ms 7ms dotnet 9.0.318
csharp 1.cs 235ms 2.8ms 37.6MB 213ms 10ms dotnet 9.0.318

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 4990ms 415ms 40.2MB 4877ms 317ms dotnet 9.0.318

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 1338ms 83ms 39.5MB 1447ms 73ms dotnet 9.0.318

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5.cs 2515ms 24ms 440.0MB 2690ms 250ms dotnet 9.0.318
csharp 6.cs 3319ms 218ms 437.6MB 3393ms 273ms dotnet 9.0.318

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5.cs 394ms 5.1ms 73.8MB 370ms 33ms dotnet 9.0.318
csharp 6.cs 560ms 7.0ms 75.4MB 530ms 33ms dotnet 9.0.318

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 4071ms 82ms 37.6MB 4150ms 47ms dotnet 9.0.318

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 1287ms 120ms 37.8MB 1393ms 27ms dotnet 9.0.318

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 6-im.cpp 2915ms 1.5ms 5.5MB 11537ms 7ms clang++ 18.1.3
cpp 6-im.cpp 2917ms 0.5ms 2.4MB 11547ms 3ms g++ 13.3.0
cpp 8-m.cpp 2934ms 0.7ms 3.3MB 11603ms 3ms clang++ 18.1.3
cpp 8-m.cpp 2973ms 15ms 2.4MB 11770ms 3ms g++ 13.3.0
csharp 3-m.cs 5928ms 20ms 33.5MB 23127ms 17ms dotnet 9.0.318

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 6-im.cpp 734ms 0.8ms 1.4MB 2880ms 0ms g++ 13.3.0
cpp 8-m.cpp 741ms 3.9ms 3.3MB 2880ms 3ms clang++ 18.1.3
cpp 8-m.cpp 748ms 5.3ms 1.4MB 2943ms 0ms g++ 13.3.0
cpp 6-im.cpp 748ms 21ms 3.4MB 2880ms 7ms clang++ 18.1.3
csharp 3-m.cs 1536ms 1.6ms 34.0MB 5793ms 13ms dotnet 9.0.318

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 6-im.cpp 189ms 0.5ms 1.4MB 713ms 0ms g++ 13.3.0
cpp 8-m.cpp 192ms 2.2ms 1.4MB 723ms 0ms g++ 13.3.0
cpp 8-m.cpp 197ms 5.8ms 3.4MB 717ms 0ms clang++ 18.1.3
cpp 6-im.cpp 198ms 15ms 5.4MB 723ms 3ms clang++ 18.1.3
csharp 3-m.cs 449ms 3.7ms 33.3MB 1487ms 17ms dotnet 9.0.318