Programming Language and compiler
Benchmarks

Wasm VS C# benchmarks

Current benchmark data was generated on Fri Aug 01 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 940ms 5.4ms 167.7MB 933ms 127ms dotnet/aot 9.0.303
csharp 1.cs 952ms 25ms 200.7MB 960ms 150ms dotnet 9.0.303
csharp 1.cs 1675ms 21ms 101.3MB 1873ms 200ms mono 6.12.0
wasm 5.rs 1754ms 5.6ms 33.8MB 1733ms 10ms wasmtime 35.0.0
wasm 3.rs 1818ms 28ms 49.8MB 1783ms 20ms wasmtime 35.0.0
wasm 4.rs 1833ms 6.3ms 33.7MB 1813ms 7ms wasmtime 35.0.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 115ms 10ms 38.9MB 80ms 27ms dotnet/aot 9.0.303
csharp 1.cs 143ms 2.1ms 42.1MB 120ms 13ms mono 6.12.0
wasm 5.rs 171ms 2.9ms 19.8MB 160ms 0ms wasmtime 35.0.0
wasm 4.rs 174ms 0.5ms 19.8MB 160ms 0ms wasmtime 35.0.0
wasm 3.rs 181ms 14ms 21.8MB 167ms 0ms wasmtime 35.0.0
csharp 1.cs 198ms 7.5ms 50.1MB 157ms 30ms dotnet 9.0.303

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1118ms 22ms 20.1MB 1100ms 0ms wasmtime 35.0.0
csharp 1-m.cs 2078ms 121ms 50.7MB 7197ms 77ms dotnet/aot 9.0.303
csharp 1-m.cs 2932ms 111ms 73.9MB 9117ms 90ms dotnet 9.0.303

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 81ms 2.8ms 20.2MB 70ms 0ms wasmtime 35.0.0
csharp 1-m.cs 157ms 8.6ms 20.3MB 457ms 13ms dotnet/aot 9.0.303
csharp 1-m.cs 284ms 10.0ms 37.1MB 813ms 20ms dotnet 9.0.303

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 416ms 5.6ms 19.5MB 403ms 0ms wasmtime 35.0.0
csharp 1.cs 4085ms 1.5ms 18.4MB 4060ms 10ms dotnet/aot 9.0.303
csharp 1.cs 4945ms 9.9ms 37.9MB 4913ms 20ms dotnet 9.0.303

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 112ms 2.4ms 18.7MB 100ms 0ms wasmtime 35.0.0
csharp 1.cs 679ms 1.9ms 14.6MB 660ms 7ms dotnet/aot 9.0.303
csharp 1.cs 862ms 3.7ms 33.8MB 837ms 13ms dotnet 9.0.303

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 4146ms 2.1ms 17.3MB 4133ms 0ms wasmtime 35.0.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 348ms 0.1ms 17.4MB 340ms 0ms wasmtime 35.0.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5-m.cs 125ms 3.7ms 24.1MB 363ms 77ms dotnet/aot 9.0.303
csharp 5-m.cs 196ms 8.4ms 37.5MB 470ms 123ms dotnet 9.0.303
wasm 1.rs 220ms 0.6ms 18.0MB 210ms 0ms wasmtime 35.0.0
csharp 5-m.cs 223ms 3.2ms 38.7MB 650ms 70ms mono 6.12.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5-m.cs 24ms 2.5ms 15.9MB 37ms 13ms dotnet/aot 9.0.303
wasm 1.rs 30ms 0.9ms 18.1MB 20ms 0ms wasmtime 35.0.0
csharp 5-m.cs 61ms 2.6ms 37.1MB 87ms 17ms dotnet 9.0.303
csharp 5-m.cs 71ms 2.2ms 30.7MB 107ms 17ms mono 6.12.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 6.4ms 0.3ms 18.0MB 0ms 0ms wasmtime 35.0.0
csharp 1.cs 6.8ms 2.0ms 9.5MB 0ms 0ms dotnet/aot 9.0.303
csharp 1.cs 30ms 1.2ms 21.3MB 20ms 0ms mono 6.12.0
csharp 1.cs 35ms 0.9ms 26.1MB 20ms 4ms dotnet 9.0.303

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 93ms 1.9ms 17.6MB 80ms 0ms wasmtime 35.0.0
csharp 2.cs 96ms 0.5ms 9.8MB 87ms 0ms dotnet/aot 9.0.303
csharp 2.cs 147ms 3.0ms 24.9MB 133ms 0ms mono 6.12.0
csharp 2.cs 253ms 7.4ms 29.4MB 237ms 7ms dotnet 9.0.303
csharp 1.cs 1034ms 8.1ms 13.1MB 1013ms 3ms dotnet/aot 9.0.303
csharp 1.cs 1344ms 54ms 32.6MB 1333ms 13ms dotnet 9.0.303
csharp 1.cs 3299ms 27ms 43.6MB 3257ms 33ms 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 0.8ms 18.2MB 240ms 0ms wasmtime 35.0.0
csharp 2.cs 277ms 1.0ms 9.8MB 263ms 0ms dotnet/aot 9.0.303
csharp 2.cs 357ms 2.3ms 21.1MB 343ms 0ms mono 6.12.0
csharp 2.cs 399ms 2.0ms 29.4MB 387ms 10ms dotnet 9.0.303
csharp 1.cs 3099ms 25ms 13.1MB 3083ms 3ms dotnet/aot 9.0.303
csharp 1.cs 3610ms 46ms 33.3MB 3593ms 17ms dotnet 9.0.303
csharp 1.cs timeout 0.0ms 45.6MB 4933ms 57ms mono 6.12.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 47ms 0.2ms 18.2MB 40ms 0ms wasmtime 35.0.0
csharp 2.cs 54ms 1.0ms 9.8MB 40ms 0ms dotnet/aot 9.0.303
csharp 2.cs 92ms 2.5ms 22.7MB 77ms 0ms mono 6.12.0
csharp 2.cs 162ms 2.1ms 29.4MB 140ms 7ms dotnet 9.0.303
csharp 1.cs 1627ms 7.1ms 32.5MB 1617ms 10ms dotnet 9.0.303
csharp 1.cs 1814ms 9.2ms 29.2MB 1800ms 0ms mono 6.12.0
csharp 1.cs 1831ms 7.6ms 12.8MB 1813ms 0ms dotnet/aot 9.0.303

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 4.cs 368ms 62ms 37.4MB 347ms 10ms dotnet 9.0.303
csharp 2.cs 555ms 59ms 39.9MB 530ms 17ms dotnet 9.0.303
wasm 8.rs 817ms 1.4ms 21.1MB 803ms 0ms wasmtime 35.0.0
csharp 1.cs 2032ms 7.1ms 36.4MB 2013ms 7ms dotnet 9.0.303
csharp 3.cs 2350ms 12ms 16.3MB 2337ms 0ms dotnet/aot 9.0.303
csharp 3.cs 2444ms 2.0ms 36.8MB 2413ms 10ms dotnet 9.0.303
csharp 1.cs 3888ms 10ms 16.2MB 3870ms 0ms dotnet/aot 9.0.303
csharp 1.cs timeout 0.0ms 24.1MB 4983ms 0ms mono 6.12.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 8.rs 42ms 1.1ms 18.1MB 30ms 0ms wasmtime 35.0.0
csharp 4.cs 80ms 2.1ms 34.5MB 57ms 10ms dotnet 9.0.303
csharp 3.cs 108ms 2.0ms 13.3MB 100ms 0ms dotnet/aot 9.0.303
csharp 2.cs 117ms 3.8ms 37.1MB 93ms 10ms dotnet 9.0.303
csharp 1.cs 139ms 6.8ms 33.8MB 120ms 7ms dotnet 9.0.303
csharp 3.cs 165ms 4.4ms 33.9MB 140ms 10ms dotnet 9.0.303
csharp 1.cs 174ms 3.7ms 13.0MB 160ms 0ms dotnet/aot 9.0.303
csharp 1.cs 567ms 3.0ms 23.3MB 553ms 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 517ms 7.3ms 121.6MB 480ms 83ms dotnet/aot 9.0.303
csharp 1.cs 571ms 37ms 146.6MB 527ms 110ms dotnet/aot 9.0.303
csharp 2.cs 683ms 21ms 136.3MB 630ms 97ms dotnet 9.0.303
csharp 1.cs 685ms 0.3ms 167.1MB 637ms 120ms dotnet 9.0.303
wasm 1.rs 880ms 4.4ms 41.7MB 857ms 10ms wasmtime 35.0.0
csharp 1.cs 1259ms 19ms 140.4MB 1457ms 147ms mono 6.12.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 134ms 9.0ms 59.6MB 103ms 37ms dotnet/aot 9.0.303
csharp 1.cs 150ms 4.8ms 73.3MB 120ms 43ms dotnet/aot 9.0.303
wasm 1.rs 192ms 0.3ms 24.1MB 180ms 0ms wasmtime 35.0.0
csharp 2.cs 259ms 1.2ms 73.3MB 223ms 37ms dotnet 9.0.303
csharp 1.cs 259ms 7.4ms 69.4MB 230ms 37ms mono 6.12.0
csharp 1.cs 272ms 2.0ms 89.9MB 233ms 60ms dotnet 9.0.303

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 9.cs 360ms 0.9ms 27.9MB 340ms 7ms dotnet 9.0.303
csharp 8.cs 370ms 0.9ms 9.9MB 357ms 0ms dotnet/aot 9.0.303
wasm 1.rs 410ms 1.4ms 17.8MB 400ms 0ms wasmtime 35.0.0
csharp 8.cs 420ms 3.5ms 27.6MB 400ms 7ms dotnet 9.0.303
wasm 2.rs 565ms 5.2ms 17.9MB 553ms 0ms wasmtime 35.0.0
csharp 8.cs 1246ms 2.5ms 22.8MB 1230ms 0ms mono 6.12.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 8.cs 46ms 1.3ms 9.9MB 33ms 0ms dotnet/aot 9.0.303
wasm 1.rs 48ms 0.9ms 17.8MB 40ms 0ms wasmtime 35.0.0
wasm 2.rs 65ms 1.2ms 17.8MB 50ms 0ms wasmtime 35.0.0
csharp 9.cs 93ms 5.0ms 27.8MB 73ms 7ms dotnet 9.0.303
csharp 8.cs 94ms 2.2ms 27.6MB 77ms 3ms dotnet 9.0.303
csharp 8.cs 162ms 3.6ms 22.9MB 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 304ms 2.9ms 78.8MB 283ms 7ms dotnet/aot 9.0.303
csharp 1.cs 335ms 11ms 96.1MB 310ms 17ms dotnet 9.0.303
wasm 2.rs 385ms 7.3ms 22.7MB 370ms 0ms wasmtime 35.0.0
csharp 2.cs 395ms 5.1ms 35.8MB 370ms 10ms dotnet 9.0.303
csharp 2.cs 425ms 3.3ms 17.5MB 410ms 0ms dotnet/aot 9.0.303
wasm 1.rs 450ms 3.8ms 56.9MB 437ms 0ms wasmtime 35.0.0
csharp 1.cs 535ms 4.1ms 84.0MB 517ms 7ms mono 6.12.0
csharp 2.cs 1862ms 5.9ms 27.5MB 1843ms 3ms mono 6.12.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 66ms 2.7ms 24.9MB 50ms 0ms dotnet/aot 9.0.303
wasm 1.rs 92ms 1.1ms 27.5MB 80ms 0ms wasmtime 35.0.0
csharp 1.cs 98ms 1.4ms 42.5MB 80ms 10ms dotnet 9.0.303
wasm 2.rs 99ms 0.8ms 19.1MB 90ms 0ms wasmtime 35.0.0
csharp 2.cs 108ms 1.0ms 11.8MB 97ms 0ms dotnet/aot 9.0.303
csharp 2.cs 131ms 1.6ms 30.0MB 110ms 10ms dotnet 9.0.303
csharp 1.cs 142ms 0.4ms 38.0MB 127ms 0ms mono 6.12.0
csharp 2.cs 480ms 1.2ms 23.0MB 470ms 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 2146ms 21ms 18.8MB 2133ms 0ms wasmtime 35.0.0
csharp 1.cs 3202ms 2.9ms 14.0MB 3100ms 93ms dotnet/aot 9.0.303
csharp 1.cs 3585ms 20ms 38.1MB 3607ms 117ms dotnet 9.0.303

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 506ms 2.3ms 18.1MB 490ms 0ms wasmtime 35.0.0
csharp 1.cs 754ms 6.4ms 13.4MB 723ms 20ms dotnet/aot 9.0.303
csharp 1.cs 994ms 8.3ms 37.4MB 1083ms 40ms dotnet 9.0.303

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 2836ms 4.2ms 13.1MB 2800ms 27ms dotnet/aot 9.0.303
csharp 1.cs 2986ms 23ms 35.6MB 3047ms 47ms dotnet 9.0.303
wasm 1.rs 3412ms 3.1ms 17.5MB 3400ms 0ms wasmtime 35.0.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 1.cs 716ms 3.8ms 13.0MB 693ms 13ms dotnet/aot 9.0.303
wasm 1.rs 869ms 7.9ms 17.5MB 857ms 0ms wasmtime 35.0.0
csharp 1.cs 995ms 6.2ms 35.4MB 1087ms 20ms dotnet 9.0.303

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 1885ms 25ms 10.5MB 7280ms 0ms dotnet/aot 9.0.303
csharp 3-m.cs 1919ms 3.3ms 30.1MB 7350ms 23ms dotnet 9.0.303
wasm 7.rs 3602ms 3.8ms 18.1MB 3590ms 0ms wasmtime 35.0.0
wasm 2.rs 3607ms 9.5ms 17.8MB 3590ms 0ms wasmtime 35.0.0
csharp 3-m.cs 4704ms 149ms 25.7MB 17910ms 13ms mono 6.12.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 479ms 1.1ms 10.4MB 1817ms 0ms dotnet/aot 9.0.303
csharp 3-m.cs 534ms 3.5ms 30.0MB 1880ms 17ms dotnet 9.0.303
wasm 2.rs 905ms 0.6ms 17.4MB 890ms 0ms wasmtime 35.0.0
wasm 7.rs 909ms 1.9ms 17.6MB 897ms 0ms wasmtime 35.0.0
csharp 3-m.cs 1244ms 39ms 25.7MB 4693ms 10ms mono 6.12.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 3-m.cs 128ms 0.6ms 10.6MB 453ms 0ms dotnet/aot 9.0.303
csharp 3-m.cs 180ms 5.3ms 28.5MB 503ms 7ms dotnet 9.0.303
wasm 7.rs 233ms 1.0ms 17.8MB 220ms 0ms wasmtime 35.0.0
wasm 2.rs 234ms 1.7ms 17.3MB 220ms 0ms wasmtime 35.0.0
csharp 3-m.cs 347ms 1.9ms 25.4MB 1170ms 7ms mono 6.12.0