Programming Language and compiler
Benchmarks

OCaml VS Wasm 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
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
ocaml 1.ml 3028ms 44ms 157.2MB 2940ms 73ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
ocaml 1.ml 214ms 0.9ms 19.1MB 200ms 0ms ocaml 5.3.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 2914ms 16ms 4.9MB 2907ms 0ms ocaml 5.3.0
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
ocaml 2.ml 245ms 3.3ms 4.9MB 237ms 0ms ocaml 5.3.0
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
wasm 1.rs 234ms 1.9ms 19.6MB 220ms 0ms wasmtime 34.0.0
ocaml 6.ml 347ms 1.7ms 24.8MB 337ms 0ms ocaml 5.3.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 32ms 0.8ms 17.7MB 20ms 0ms wasmtime 34.0.0
ocaml 6.ml 39ms 0.5ms 7.5MB 30ms 0ms ocaml 5.3.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 1.8ms 0.2ms 5.0MB 0ms 0ms ocaml 5.3.0
wasm 1.rs 7.1ms 0.1ms 16.7MB 0ms 0ms wasmtime 34.0.0

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
ocaml 1.ml 190ms 0.6ms 6.4MB 180ms 0ms ocaml 5.3.0

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
ocaml 1.ml 518ms 3.2ms 6.6MB 510ms 0ms ocaml 5.3.0

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
ocaml 1.ml 77ms 1.4ms 5.9MB 70ms 0ms ocaml 5.3.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 1.rs 903ms 21ms 41.8MB 877ms 10ms wasmtime 34.0.0
ocaml 1.ml 1094ms 11ms 70.2MB 1047ms 30ms ocaml 5.3.0
ocaml 2.ml 2066ms 16ms 91.8MB 2013ms 33ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 147ms 4.1ms 21.7MB 130ms 7ms ocaml 5.3.0
wasm 1.rs 196ms 4.9ms 23.8MB 180ms 0ms wasmtime 34.0.0
ocaml 2.ml 367ms 7.6ms 27.7MB 343ms 7ms ocaml 5.3.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 373ms 1.9ms 5.2MB 360ms 0ms ocaml 5.3.0
wasm 1.rs 404ms 1.2ms 17.7MB 390ms 0ms wasmtime 34.0.0
wasm 2.rs 562ms 1.1ms 17.8MB 550ms 0ms wasmtime 34.0.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 41ms 1.4ms 5.2MB 30ms 0ms ocaml 5.3.0
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

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 381ms 1.9ms 22.9MB 367ms 0ms wasmtime 34.0.0
wasm 1.rs 613ms 42ms 56.9MB 597ms 10ms wasmtime 34.0.0
ocaml 1.ml 957ms 3.4ms 550.3MB 900ms 43ms ocaml 5.3.0
ocaml 2.ml 1886ms 14ms 18.9MB 1873ms 0ms ocaml 5.3.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
ocaml 1.ml 191ms 3.0ms 141.6MB 170ms 10ms ocaml 5.3.0
ocaml 2.ml 471ms 4.3ms 9.1MB 460ms 0ms ocaml 5.3.0

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml timeout 0.0ms 462.9MB 4830ms 153ms ocaml 5.3.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 549ms 4.5ms 57.1MB 513ms 23ms ocaml 5.3.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
wasm 2.rs 3609ms 13ms 17.7MB 3590ms 0ms wasmtime 34.0.0
ocaml 2.ml 4582ms 24ms 6.4MB 4570ms 0ms ocaml 5.3.0
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
wasm 2.rs 908ms 2.9ms 19.5MB 893ms 0ms wasmtime 34.0.0
ocaml 2.ml 1159ms 5.5ms 6.1MB 1150ms 0ms ocaml 5.3.0
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
wasm 2.rs 234ms 0.4ms 17.8MB 220ms 0ms wasmtime 34.0.0
ocaml 2.ml 294ms 4.6ms 5.2MB 283ms 0ms ocaml 5.3.0
wasm 7.rs 316ms 2.7ms 17.4MB 300ms 0ms wasmtime 34.0.0