Programming Language and compiler
Benchmarks

Wasm VS C# benchmarks

Current benchmark data was generated on Mon Jun 23 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.)

binarytrees

Input: 18

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 934ms 5.4ms 205.2MB 963ms 147ms dotnet 9.0.301
csharp 1.cs 978ms 18ms 174.5MB 967ms 137ms dotnet/aot 9.0.301
csharp 1.cs 1709ms 47ms 103.2MB 1913ms 217ms mono 6.12.0
wasm 5.rs 1914ms 16ms 35.7MB 1893ms 10ms wasmtime 34.0.0
wasm 4.rs 1932ms 53ms 33.7MB 1910ms 10ms wasmtime 34.0.0
wasm 3.rs 1979ms 111ms 50.0MB 1950ms 20ms wasmtime 34.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 115ms 6.0ms 32.3MB 83ms 27ms dotnet/aot 9.0.301
csharp 1.cs 144ms 2.8ms 44.3MB 120ms 13ms mono 6.12.0
wasm 5.rs 172ms 1.4ms 19.8MB 157ms 0ms wasmtime 34.0.0
wasm 4.rs 174ms 2.0ms 19.8MB 163ms 0ms wasmtime 34.0.0
wasm 3.rs 181ms 4.1ms 21.7MB 163ms 0ms wasmtime 34.0.0
csharp 1.cs 202ms 8.2ms 50.2MB 153ms 37ms dotnet 9.0.301

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1130ms 4.9ms 20.1MB 1113ms 7ms wasmtime 34.0.0
csharp 1-m.cs 2165ms 84ms 50.8MB 7643ms 73ms dotnet/aot 9.0.301
csharp 1-m.cs 2925ms 171ms 72.9MB 9227ms 107ms dotnet 9.0.301

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 80ms 1.0ms 18.6MB 70ms 0ms wasmtime 34.0.0
csharp 1-m.cs 167ms 15ms 17.9MB 497ms 13ms dotnet/aot 9.0.301
csharp 1-m.cs 277ms 1.2ms 36.9MB 770ms 20ms dotnet 9.0.301

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 418ms 0.4ms 19.3MB 403ms 0ms wasmtime 34.0.0
csharp 1.cs 4093ms 8.3ms 18.3MB 4067ms 10ms dotnet/aot 9.0.301
csharp 1.cs 4958ms 14ms 37.8MB 4930ms 17ms dotnet 9.0.301

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 116ms 0.9ms 18.8MB 103ms 0ms wasmtime 34.0.0
csharp 1.cs 678ms 1.8ms 14.6MB 660ms 0ms dotnet/aot 9.0.301
csharp 1.cs 871ms 10ms 33.9MB 847ms 10ms dotnet 9.0.301

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 4068ms 6.6ms 17.6MB 4053ms 0ms wasmtime 34.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 348ms 3.7ms 17.6MB 337ms 0ms wasmtime 34.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5-m.cs 130ms 8.6ms 26.5MB 370ms 90ms dotnet/aot 9.0.301
csharp 5-m.cs 191ms 3.5ms 38.5MB 467ms 127ms dotnet 9.0.301
csharp 5-m.cs 230ms 6.7ms 48.8MB 660ms 90ms mono 6.12.0
wasm 1.rs 234ms 1.9ms 19.6MB 220ms 0ms wasmtime 34.0.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5-m.cs 25ms 0.6ms 15.4MB 37ms 13ms dotnet/aot 9.0.301
wasm 1.rs 32ms 0.8ms 17.7MB 20ms 0ms wasmtime 34.0.0
csharp 5-m.cs 65ms 6.7ms 37.0MB 87ms 13ms dotnet 9.0.301
csharp 5-m.cs 71ms 1.6ms 30.0MB 97ms 27ms mono 6.12.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 7.1ms 0.1ms 16.7MB 0ms 0ms wasmtime 34.0.0
csharp 1.cs 7.3ms 1.8ms 8.3MB 0ms 0ms dotnet/aot 9.0.301
csharp 1.cs 32ms 0.6ms 21.3MB 20ms 0ms mono 6.12.0
csharp 1.cs 35ms 1.3ms 26.1MB 20ms 4ms dotnet 9.0.301

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 93ms 2.2ms 18.2MB 80ms 0ms wasmtime 34.0.0
csharp 2.cs 99ms 0.9ms 9.9MB 87ms 0ms dotnet/aot 9.0.301
csharp 2.cs 150ms 3.3ms 21.1MB 137ms 0ms mono 6.12.0
csharp 2.cs 256ms 3.5ms 29.1MB 240ms 7ms dotnet 9.0.301
csharp 1.cs 1041ms 13ms 13.1MB 1027ms 0ms dotnet/aot 9.0.301
csharp 1.cs 1312ms 12ms 32.9MB 1300ms 13ms dotnet 9.0.301
csharp 1.cs 3351ms 22ms 43.7MB 3303ms 37ms mono 6.12.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 255ms 1.5ms 17.7MB 240ms 0ms wasmtime 34.0.0
csharp 2.cs 279ms 1.8ms 9.8MB 267ms 0ms dotnet/aot 9.0.301
csharp 2.cs 362ms 8.0ms 22.8MB 347ms 0ms mono 6.12.0
csharp 2.cs 400ms 2.8ms 29.5MB 387ms 7ms dotnet 9.0.301
csharp 1.cs 3081ms 17ms 13.3MB 3057ms 13ms dotnet/aot 9.0.301
csharp 1.cs 3721ms 174ms 32.6MB 3687ms 20ms dotnet 9.0.301
csharp 1.cs timeout 0.0ms 45.6MB 4943ms 47ms mono 6.12.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 48ms 0.7ms 17.9MB 40ms 0ms wasmtime 34.0.0
csharp 2.cs 54ms 0.2ms 9.8MB 40ms 0ms dotnet/aot 9.0.301
csharp 2.cs 94ms 2.6ms 22.9MB 80ms 0ms mono 6.12.0
csharp 2.cs 166ms 3.1ms 29.3MB 143ms 7ms dotnet 9.0.301
csharp 1.cs 1617ms 4.4ms 32.5MB 1613ms 7ms dotnet 9.0.301
csharp 1.cs 1819ms 13ms 28.6MB 1800ms 0ms mono 6.12.0
csharp 1.cs 1833ms 5.6ms 13.0MB 1817ms 0ms dotnet/aot 9.0.301

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 4.cs 348ms 6.4ms 37.4MB 323ms 10ms dotnet 9.0.301
csharp 2.cs 587ms 80ms 39.9MB 557ms 20ms dotnet 9.0.301
wasm 8.rs 832ms 1.4ms 21.1MB 820ms 0ms wasmtime 34.0.0
csharp 1.cs 2042ms 8.0ms 36.5MB 2013ms 10ms dotnet 9.0.301
csharp 3.cs 2350ms 4.8ms 16.4MB 2337ms 0ms dotnet/aot 9.0.301
csharp 3.cs 2483ms 55ms 36.5MB 2457ms 10ms dotnet 9.0.301
csharp 1.cs 3995ms 103ms 16.5MB 3980ms 0ms dotnet/aot 9.0.301
csharp 1.cs timeout 0.0ms 24.2MB 4987ms 0ms mono 6.12.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 8.rs 44ms 1.0ms 18.2MB 30ms 0ms wasmtime 34.0.0
csharp 4.cs 81ms 1.6ms 34.4MB 60ms 10ms dotnet 9.0.301
csharp 3.cs 107ms 1.4ms 13.5MB 93ms 0ms dotnet/aot 9.0.301
csharp 2.cs 115ms 4.6ms 36.9MB 93ms 10ms dotnet 9.0.301
csharp 1.cs 142ms 1.0ms 33.6MB 123ms 10ms dotnet 9.0.301
csharp 1.cs 176ms 5.4ms 13.5MB 160ms 0ms dotnet/aot 9.0.301
csharp 3.cs 176ms 9.3ms 34.0MB 150ms 13ms dotnet 9.0.301
csharp 1.cs 573ms 5.4ms 23.8MB 557ms 0ms mono 6.12.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 529ms 15ms 121.1MB 490ms 90ms dotnet/aot 9.0.301
csharp 1.cs 591ms 6.0ms 143.1MB 560ms 107ms dotnet/aot 9.0.301
csharp 2.cs 689ms 3.3ms 136.1MB 640ms 97ms dotnet 9.0.301
csharp 1.cs 796ms 22ms 168.8MB 747ms 127ms dotnet 9.0.301
wasm 1.rs 903ms 21ms 41.8MB 877ms 10ms wasmtime 34.0.0
csharp 1.cs 1276ms 14ms 140.6MB 1483ms 157ms mono 6.12.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 129ms 4.6ms 57.3MB 103ms 30ms dotnet/aot 9.0.301
csharp 1.cs 161ms 5.6ms 74.5MB 120ms 53ms dotnet/aot 9.0.301
wasm 1.rs 196ms 4.9ms 23.8MB 180ms 0ms wasmtime 34.0.0
csharp 1.cs 265ms 3.3ms 69.4MB 240ms 30ms mono 6.12.0
csharp 2.cs 272ms 4.1ms 75.6MB 230ms 47ms dotnet 9.0.301
csharp 1.cs 287ms 3.4ms 89.4MB 250ms 63ms dotnet 9.0.301

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 9.cs 363ms 6.1ms 27.9MB 340ms 10ms dotnet 9.0.301
csharp 8.cs 371ms 2.5ms 9.9MB 360ms 0ms dotnet/aot 9.0.301
wasm 1.rs 404ms 1.2ms 17.7MB 390ms 0ms wasmtime 34.0.0
csharp 8.cs 431ms 6.0ms 27.8MB 413ms 10ms dotnet 9.0.301
wasm 2.rs 562ms 1.1ms 17.8MB 550ms 0ms wasmtime 34.0.0
csharp 8.cs 1252ms 0.3ms 22.4MB 1240ms 0ms mono 6.12.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 8.cs 44ms 0.0ms 9.9MB 30ms 0ms dotnet/aot 9.0.301
wasm 1.rs 49ms 0.5ms 17.9MB 37ms 0ms wasmtime 34.0.0
wasm 2.rs 66ms 1.6ms 18.0MB 50ms 0ms wasmtime 34.0.0
csharp 8.cs 96ms 0.6ms 27.8MB 77ms 10ms dotnet 9.0.301
csharp 9.cs 111ms 17ms 27.9MB 87ms 7ms dotnet 9.0.301
csharp 8.cs 166ms 2.0ms 20.8MB 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 320ms 4.3ms 78.8MB 300ms 3ms dotnet/aot 9.0.301
csharp 1.cs 365ms 4.2ms 96.4MB 340ms 13ms dotnet 9.0.301
wasm 2.rs 381ms 1.9ms 22.9MB 367ms 0ms wasmtime 34.0.0
csharp 2.cs 401ms 4.4ms 35.8MB 373ms 10ms dotnet 9.0.301
csharp 2.cs 426ms 3.0ms 17.4MB 413ms 0ms dotnet/aot 9.0.301
csharp 1.cs 556ms 2.5ms 81.9MB 533ms 10ms mono 6.12.0
wasm 1.rs 613ms 42ms 56.9MB 597ms 10ms wasmtime 34.0.0
csharp 2.cs 1875ms 14ms 29.4MB 1860ms 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 1.3ms 24.7MB 50ms 0ms dotnet/aot 9.0.301
wasm 1.rs 95ms 0.7ms 27.6MB 80ms 0ms wasmtime 34.0.0
wasm 2.rs 98ms 1.0ms 20.9MB 87ms 0ms wasmtime 34.0.0
csharp 1.cs 106ms 3.2ms 42.6MB 83ms 10ms dotnet 9.0.301
csharp 2.cs 109ms 1.6ms 11.9MB 93ms 0ms dotnet/aot 9.0.301
csharp 2.cs 130ms 1.1ms 30.3MB 110ms 10ms dotnet 9.0.301
csharp 1.cs 146ms 1.6ms 38.5MB 130ms 10ms mono 6.12.0
csharp 2.cs 495ms 15ms 23.5MB 483ms 0ms mono 6.12.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 2220ms 15ms 18.7MB 2203ms 0ms wasmtime 34.0.0
csharp 1.cs 3234ms 15ms 13.9MB 3143ms 90ms dotnet/aot 9.0.301
csharp 1.cs 3666ms 54ms 38.4MB 3690ms 117ms dotnet 9.0.301

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 523ms 2.7ms 18.4MB 510ms 0ms wasmtime 34.0.0
csharp 1.cs 753ms 6.8ms 13.4MB 720ms 17ms dotnet/aot 9.0.301
csharp 1.cs 1012ms 9.9ms 37.6MB 1103ms 37ms dotnet 9.0.301

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 2846ms 4.7ms 13.0MB 2810ms 23ms dotnet/aot 9.0.301
csharp 1.cs 2974ms 38ms 35.4MB 3033ms 43ms dotnet 9.0.301
wasm 1.rs 3588ms 10ms 17.7MB 3573ms 0ms wasmtime 34.0.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 739ms 49ms 13.0MB 723ms 7ms dotnet/aot 9.0.301
wasm 1.rs 900ms 5.2ms 18.0MB 887ms 0ms wasmtime 34.0.0
csharp 1.cs 1000ms 3.1ms 35.5MB 1090ms 17ms dotnet 9.0.301

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 1888ms 32ms 10.5MB 7287ms 7ms dotnet/aot 9.0.301
csharp 3-m.cs 1932ms 11ms 30.1MB 7360ms 17ms dotnet 9.0.301
wasm 2.rs 3609ms 13ms 17.7MB 3590ms 0ms wasmtime 34.0.0
csharp 3-m.cs 4684ms 65ms 27.0MB 17910ms 10ms mono 6.12.0
wasm 7.rs 4900ms 13ms 17.7MB 4887ms 0ms wasmtime 34.0.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 477ms 1.2ms 10.1MB 1823ms 7ms dotnet/aot 9.0.301
csharp 3-m.cs 666ms 1.4ms 29.9MB 1670ms 10ms dotnet 9.0.301
wasm 2.rs 908ms 2.9ms 19.5MB 893ms 0ms wasmtime 34.0.0
csharp 3-m.cs 1209ms 1.7ms 25.9MB 4553ms 7ms mono 6.12.0
wasm 7.rs 1231ms 2.5ms 18.1MB 1220ms 0ms wasmtime 34.0.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 129ms 0.6ms 10.8MB 450ms 3ms dotnet/aot 9.0.301
wasm 2.rs 234ms 0.4ms 17.8MB 220ms 0ms wasmtime 34.0.0
csharp 3-m.cs 251ms 7.7ms 29.0MB 460ms 10ms dotnet 9.0.301
wasm 7.rs 316ms 2.7ms 17.4MB 300ms 0ms wasmtime 34.0.0
csharp 3-m.cs 354ms 11ms 25.4MB 1197ms 3ms mono 6.12.0