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 Zig 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
zig 1.zig 2945ms 28ms 49.1MB 2920ms 7ms zig 0.14.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 280ms 53ms 7.1MB 240ms 0ms zig 0.14.1
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
zig 1.zig 5068ms 18ms 2.4MB 5030ms 20ms zig 0.14.1
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
zig 1.zig 841ms 12ms 2.0MB 823ms 3ms zig 0.14.1
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
zig 1.zig 138ms 0.5ms 1.1MB 127ms 0ms zig 0.14.1
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
zig 1.zig 17ms 1.2ms 1.1MB 10ms 0ms zig 0.14.1
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
zig 1.zig 1.3ms 0.5ms 1.1MB 0ms 0ms zig 0.14.1
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
zig 1-m.zig 798ms 15ms 66.9MB 2580ms 27ms zig 0.14.1
zig 1.zig 1043ms 10ms 26.3MB 1013ms 7ms zig 0.14.1
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
zig 1-m.zig 117ms 4.2ms 55.0MB 293ms 43ms zig 0.14.1
zig 1.zig 130ms 6.2ms 15.5MB 107ms 3ms zig 0.14.1
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
zig 1.zig 51ms 1.5ms 2.7MB 40ms 0ms zig 0.14.1
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
zig 1.zig 143ms 5.9ms 2.7MB 133ms 0ms zig 0.14.1
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
zig 1.zig 26ms 0.9ms 1.1MB 13ms 0ms zig 0.14.1
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
zig 1.zig 350ms 2.1ms 4.2MB 340ms 0ms zig 0.14.1
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
zig 1.zig 17ms 0.6ms 1.1MB 10ms 0ms zig 0.14.1
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
zig 1.zig 1494ms 63ms 41.2MB 1463ms 13ms zig 0.14.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
zig 1.zig 267ms 4.3ms 11.0MB 253ms 3ms zig 0.14.1
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
zig 3.zig 379ms 3.1ms 1.1MB 370ms 0ms zig 0.14.1
zig 2.zig 470ms 2.9ms 1.1MB 457ms 0ms zig 0.14.1
zig 1.zig 510ms 3.2ms 1.1MB 500ms 0ms zig 0.14.1
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
zig 3.zig 42ms 3.2ms 1.1MB 33ms 0ms zig 0.14.1
zig 2.zig 50ms 2.1ms 1.1MB 40ms 0ms zig 0.14.1
zig 1.zig 56ms 2.3ms 1.1MB 47ms 0ms zig 0.14.1
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
zig 2.zig 552ms 15ms 6.0MB 543ms 0ms zig 0.14.1
csharp 2.cs 819ms 3.8ms 33.5MB 797ms 13ms dotnet 9.0.318
zig 1.zig 958ms 9.6ms 40.1MB 940ms 0ms zig 0.14.1
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
zig 2.zig 107ms 1.3ms 2.2MB 100ms 0ms zig 0.14.1
zig 1.zig 170ms 4.1ms 11.0MB 160ms 0ms zig 0.14.1
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
zig 1.zig 3461ms 6.4ms 2.3MB 3433ms 13ms zig 0.14.1
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
zig 1.zig 854ms 121ms 1.9MB 837ms 0ms zig 0.14.1
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
csharp 3-m.cs 5928ms 20ms 33.5MB 23127ms 17ms dotnet 9.0.318
zig 1.zig 11057ms 6.2ms 1.1MB 11043ms 0ms zig 0.14.1

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
zig 1.zig 2773ms 1.4ms 1.1MB 2757ms 0ms zig 0.14.1

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
zig 1.zig 697ms 1.0ms 1.1MB 690ms 0ms zig 0.14.1