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 D 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
d 1.d 2842ms 6.4ms 312.7MB 2810ms 20ms ldc2 1.43.0

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
d 1.d 304ms 39ms 209.6MB 270ms 20ms ldc2 1.43.0

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
d 1.d 36420ms 328ms 25.7MB 36310ms 93ms ldc2 1.43.0

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
d 1.d 1418ms 8.4ms 8.6MB 1397ms 3ms ldc2 1.43.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 5463ms 8.6ms 8.0MB 5450ms 0ms ldc2 1.43.0
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
d 1.d 920ms 1.5ms 7.4MB 907ms 0ms ldc2 1.43.0
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
d 1.d 254ms 5.5ms 1.7MB 240ms 0ms ldc2 1.43.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 30ms 3.8ms 1.7MB 23ms 0ms ldc2 1.43.0
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
d 1.d 2.4ms 0.4ms 3.2MB 0ms 0ms ldc2 1.43.0
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
d 2.d 95ms 1.7ms 15.9MB 103ms 0ms ldc2 1.43.0
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
d 2.d 915ms 82ms 150.2MB 880ms 27ms ldc2 1.43.0
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
d 1-m.d 1028ms 32ms 44.3MB 3027ms 13ms ldc2 1.43.0
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
d 1-m.d 136ms 9.7ms 37.2MB 347ms 3ms ldc2 1.43.0
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
d 1.d 149ms 2.1ms 6.8MB 143ms 0ms ldc2 1.43.0
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
d 1.d 437ms 6.1ms 7.9MB 440ms 0ms ldc2 1.43.0
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
d 1.d 66ms 3.1ms 6.1MB 57ms 0ms ldc2 1.43.0
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
d 1.d 511ms 11ms 7.1MB 500ms 0ms ldc2 1.43.0
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
d 1.d 26ms 2.0ms 1.7MB 17ms 0ms ldc2 1.43.0
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
d 1.d 1511ms 7.3ms 312.8MB 1477ms 30ms ldc2 1.43.0

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
d 1.d 323ms 3.5ms 312.6MB 277ms 37ms ldc2 1.43.0
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
d 1.d 592ms 1.6ms 1.6MB 577ms 0ms ldc2 1.43.0
d 2.d 594ms 2.9ms 1.7MB 583ms 0ms ldc2 1.43.0
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
d 1.d 64ms 0.8ms 1.7MB 50ms 0ms ldc2 1.43.0
d 2.d 75ms 2.5ms 1.8MB 63ms 0ms ldc2 1.43.0
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
csharp 2.cs 819ms 3.8ms 33.5MB 797ms 13ms dotnet 9.0.318
d 1.d 967ms 5.7ms 43.2MB 943ms 10ms ldc2 1.43.0
csharp 1.cs 1042ms 3.6ms 96.6MB 1020ms 13ms dotnet 9.0.318
d 2.d 1100ms 6.3ms 48.1MB 1080ms 0ms ldc2 1.43.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 171ms 1.6ms 14.1MB 157ms 0ms ldc2 1.43.0
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
d 2.d 236ms 2.0ms 15.3MB 220ms 0ms ldc2 1.43.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 3332ms 74ms 8.1MB 3360ms 47ms ldc2 1.43.0
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
d 1.d 792ms 3.6ms 8.1MB 790ms 10ms ldc2 1.43.0
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
d 3.d 806ms 71ms 170.2MB 1080ms 30ms ldc2 1.43.0
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
d 3.d 82ms 1.9ms 22.4MB 93ms 3ms ldc2 1.43.0
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
d 1.d 6977ms 15ms 4.0MB 6983ms 33ms ldc2 1.43.0

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
d 1.d 1766ms 12ms 4.0MB 1760ms 3ms ldc2 1.43.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 5928ms 20ms 33.5MB 23127ms 17ms dotnet 9.0.318
d 1.d 11045ms 7.1ms 3.9MB 11033ms 0ms ldc2 1.43.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 1536ms 1.6ms 34.0MB 5793ms 13ms dotnet 9.0.318
d 1.d 2767ms 0.6ms 3.6MB 2760ms 0ms ldc2 1.43.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 449ms 3.7ms 33.3MB 1487ms 17ms dotnet 9.0.318
d 1.d 701ms 11ms 3.2MB 693ms 0ms ldc2 1.43.0