Programming Language and compiler
Benchmarks

Wasm VS C benchmarks

Current benchmark data was generated on Sun Jul 13 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
wasm 5.rs 1739ms 5.1ms 34.0MB 1720ms 7ms wasmtime 34.0.1
wasm 4.rs 1815ms 23ms 34.1MB 1793ms 10ms wasmtime 34.0.1
wasm 3.rs 1852ms 9.2ms 50.0MB 1823ms 17ms wasmtime 34.0.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 5.rs 171ms 1.3ms 20.0MB 157ms 0ms wasmtime 34.0.1
wasm 4.rs 174ms 3.1ms 20.0MB 163ms 0ms wasmtime 34.0.1
wasm 3.rs 180ms 3.2ms 22.0MB 163ms 0ms wasmtime 34.0.1

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 1098ms 7.8ms 20.3MB 1083ms 0ms wasmtime 34.0.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 3.rs 78ms 3.2ms 18.7MB 63ms 0ms wasmtime 34.0.1

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 420ms 3.1ms 19.6MB 407ms 0ms wasmtime 34.0.1

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 114ms 1.7ms 19.0MB 100ms 0ms wasmtime 34.0.1

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 4157ms 18ms 17.8MB 4143ms 0ms wasmtime 34.0.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 349ms 4.0ms 17.7MB 337ms 0ms wasmtime 34.0.1

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 234ms 2.4ms 18.2MB 220ms 0ms wasmtime 34.0.1

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 31ms 0.4ms 18.3MB 20ms 0ms wasmtime 34.0.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 1.0ms 0.0ms 1.3MB 0ms 0ms zigcc 0.14.1
c 1.c 1.2ms 0.1ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 1.2ms 0.0ms 2.1MB 0ms 0ms gcc 15.1.0
wasm 1.rs 6.7ms 0.5ms 18.2MB 0ms 0ms wasmtime 34.0.1

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 91ms 1.1ms 18.2MB 80ms 0ms wasmtime 34.0.1

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 252ms 3.4ms 17.9MB 240ms 0ms wasmtime 34.0.1

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 46ms 0.9ms 17.7MB 37ms 0ms wasmtime 34.0.1

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 223ms 10ms 7.6MB 830ms 13ms clang 14.0.0-1ubuntu1.1
c 1-mffi.c 266ms 5.3ms 6.5MB 813ms 0ms gcc 15.1.0
c 1-ffi.c 330ms 1.2ms 6.0MB 320ms 0ms zigcc 0.14.1
c 1-mffi.c 331ms 2.9ms 6.0MB 320ms 0ms zigcc 0.14.1
c 1-ffi.c 453ms 1.4ms 6.7MB 443ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 544ms 3.5ms 6.6MB 533ms 0ms gcc 15.1.0
wasm 8.rs 827ms 0.7ms 21.3MB 810ms 0ms wasmtime 34.0.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1-mffi.c 16ms 0.5ms 4.5MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 16ms 0.1ms 3.0MB 10ms 0ms zigcc 0.14.1
c 1-mffi.c 16ms 0.4ms 3.0MB 10ms 0ms zigcc 0.14.1
c 1-mffi.c 19ms 2.4ms 3.6MB 47ms 0ms gcc 15.1.0
c 1-ffi.c 22ms 0.6ms 3.5MB 10ms 0ms clang 14.0.0-1ubuntu1.1
c 1-ffi.c 26ms 0.6ms 3.8MB 20ms 0ms gcc 15.1.0
wasm 8.rs 42ms 0.5ms 18.4MB 30ms 0ms wasmtime 34.0.1

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 870ms 7.8ms 42.1MB 847ms 10ms wasmtime 34.0.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 192ms 2.6ms 24.1MB 177ms 0ms wasmtime 34.0.1

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 267ms 0.8ms 1.5MB 260ms 0ms zigcc 0.14.1
c 8-i.c 301ms 1.4ms 2.1MB 290ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 309ms 1.5ms 2.3MB 300ms 0ms gcc 15.1.0
c 5.c 313ms 1.4ms 2.3MB 303ms 0ms gcc 15.1.0
c 2.c 313ms 1.7ms 1.5MB 307ms 0ms zigcc 0.14.1
c 5.c 316ms 0.6ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 316ms 2.1ms 1.5MB 310ms 0ms zigcc 0.14.1
c 2.c 319ms 2.0ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 336ms 1.3ms 2.3MB 330ms 0ms gcc 15.1.0
wasm 1.rs 405ms 1.9ms 18.0MB 390ms 0ms wasmtime 34.0.1
wasm 2.rs 564ms 4.6ms 18.1MB 553ms 0ms wasmtime 34.0.1

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 29ms 0.3ms 1.5MB 20ms 0ms zigcc 0.14.1
c 8-i.c 32ms 0.5ms 2.1MB 20ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 33ms 0.4ms 1.5MB 30ms 0ms zigcc 0.14.1
c 5.c 33ms 0.6ms 2.3MB 30ms 0ms gcc 15.1.0
c 2.c 34ms 0.7ms 2.3MB 30ms 0ms gcc 15.1.0
c 5.c 34ms 0.4ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 35ms 0.6ms 1.5MB 30ms 0ms zigcc 0.14.1
c 8-i.c 36ms 0.5ms 2.3MB 30ms 0ms gcc 15.1.0
c 2.c 36ms 3.1ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
wasm 1.rs 47ms 0.1ms 18.1MB 37ms 0ms wasmtime 34.0.1
wasm 2.rs 65ms 1.7ms 18.1MB 50ms 0ms wasmtime 34.0.1

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 267ms 3.7ms 41.0MB 253ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 277ms 11ms 40.9MB 257ms 0ms gcc 15.1.0
c 1.c 282ms 4.5ms 40.3MB 267ms 0ms zigcc 0.14.1
wasm 2.rs 387ms 3.2ms 22.9MB 373ms 0ms wasmtime 34.0.1
wasm 1.rs 463ms 2.4ms 57.0MB 447ms 3ms wasmtime 34.0.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 56ms 2.7ms 11.8MB 43ms 0ms gcc 15.1.0
c 1.c 59ms 2.7ms 11.7MB 47ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 64ms 1.3ms 11.0MB 50ms 0ms zigcc 0.14.1
wasm 1.rs 92ms 3.2ms 27.9MB 80ms 0ms wasmtime 34.0.1
wasm 2.rs 100ms 2.0ms 19.3MB 90ms 0ms wasmtime 34.0.1

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 2143ms 4.7ms 19.0MB 2127ms 0ms wasmtime 34.0.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 506ms 0.5ms 18.3MB 490ms 0ms wasmtime 34.0.1

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 3418ms 14ms 18.1MB 3407ms 0ms wasmtime 34.0.1

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 866ms 6.0ms 17.8MB 853ms 0ms wasmtime 34.0.1

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 735ms 1.2ms 2.0MB 2887ms 0ms gcc 15.1.0
c 6-im.c 969ms 27ms 2.0MB 3773ms 0ms gcc 15.1.0
c 4-m.c 996ms 15ms 2.0MB 3907ms 0ms gcc 15.1.0
c 6-im.c 1002ms 1.1ms 3.1MB 3943ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 1119ms 3.6ms 3.4MB 4407ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1141ms 0.4ms 2.0MB 4510ms 0ms gcc 15.1.0
c 5-im.c 1326ms 1.0ms 3.1MB 5233ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1841ms 29ms 3.3MB 7233ms 7ms clang 14.0.0-1ubuntu1.1
wasm 2.rs 3597ms 3.4ms 17.7MB 3583ms 0ms wasmtime 34.0.1
wasm 7.rs 4892ms 1.4ms 19.8MB 4880ms 0ms wasmtime 34.0.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 194ms 0.5ms 2.0MB 740ms 0ms gcc 15.1.0
c 6-im.c 245ms 0.6ms 2.0MB 947ms 0ms gcc 15.1.0
c 4-m.c 258ms 0.9ms 2.1MB 990ms 0ms gcc 15.1.0
c 6-im.c 260ms 1.0ms 3.3MB 990ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 287ms 0.9ms 3.3MB 1103ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 298ms 7.7ms 2.0MB 1147ms 0ms gcc 15.1.0
c 5-im.c 341ms 2.4ms 3.3MB 1313ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 468ms 9.9ms 3.3MB 1807ms 0ms clang 14.0.0-1ubuntu1.1
wasm 2.rs 906ms 1.0ms 18.3MB 893ms 0ms wasmtime 34.0.1
wasm 7.rs 1231ms 2.6ms 17.7MB 1217ms 0ms wasmtime 34.0.1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 55ms 1.3ms 2.3MB 197ms 0ms gcc 15.1.0
c 4-m.c 72ms 0.1ms 2.0MB 260ms 0ms gcc 15.1.0
c 6-im.c 73ms 8.3ms 2.0MB 250ms 0ms gcc 15.1.0
c 6-im.c 75ms 7.4ms 3.3MB 257ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 78ms 0.6ms 3.3MB 280ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 81ms 1.3ms 2.0MB 293ms 0ms gcc 15.1.0
c 5-im.c 95ms 6.8ms 3.1MB 340ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 124ms 3.1ms 3.3MB 450ms 0ms clang 14.0.0-1ubuntu1.1
wasm 2.rs 234ms 0.9ms 17.8MB 220ms 0ms wasmtime 34.0.1
wasm 7.rs 314ms 0.5ms 18.1MB 300ms 0ms wasmtime 34.0.1