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.

OCaml VS acton 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
acton 1-m.act 2140ms 43ms 38.5MB 3237ms 57ms acton 0.30.0
ocaml 1.ml 5051ms 131ms 156.9MB 4967ms 63ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
acton 1.act 217ms 5.2ms 9.6MB 273ms 10ms acton 0.30.0
ocaml 1.ml 379ms 6.4ms 19.3MB 360ms 3ms 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 3708ms 10ms 2.7MB 3697ms 0ms ocaml 5.3.0
acton 1.act 65939ms 148ms 5.6MB 75737ms 15533ms acton 0.30.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 341ms 78ms 4.8MB 327ms 0ms ocaml 5.3.0
acton 1.act 4998ms 14ms 4.0MB 5640ms 1240ms acton 0.30.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 6.ml 349ms 5.9ms 23.0MB 333ms 0ms ocaml 5.3.0
acton 1.act 5589ms 17ms 12.8MB 6087ms 410ms acton 0.30.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 6.ml 41ms 1.4ms 5.5MB 27ms 0ms ocaml 5.3.0
acton 1.act 578ms 1.5ms 15.6MB 610ms 33ms acton 0.30.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 2.3ms 0.5ms 3.1MB 0ms 0ms ocaml 5.3.0
acton 1.act 4.5ms 1.1ms 3.8MB 0ms 0ms acton 0.30.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 271ms 4.6ms 6.5MB 257ms 0ms ocaml 5.3.0
acton 1.act 1615ms 85ms 13.3MB 2107ms 187ms acton 0.30.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 760ms 12ms 6.4MB 750ms 0ms ocaml 5.3.0
acton 1.act 4706ms 236ms 6.1MB 6103ms 523ms acton 0.30.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 131ms 26ms 5.9MB 120ms 0ms ocaml 5.3.0
acton 1.act 828ms 11ms 11.9MB 893ms 213ms acton 0.30.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 1750ms 70ms 71.3MB 1707ms 27ms ocaml 5.3.0
ocaml 2.ml 3254ms 22ms 92.0MB 3210ms 30ms ocaml 5.3.0
acton 1.act 4999ms 46ms 83.6MB 6123ms 57ms acton 0.30.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 285ms 24ms 21.8MB 267ms 0ms ocaml 5.3.0
ocaml 2.ml 599ms 0.6ms 27.8MB 570ms 10ms ocaml 5.3.0
acton 1.act 1097ms 13ms 31.2MB 1333ms 33ms acton 0.30.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 697ms 7.9ms 2.7MB 687ms 0ms ocaml 5.3.0
acton 1.act 4728ms 31ms 6.0MB 5217ms 733ms acton 0.30.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 75ms 1.3ms 2.7MB 67ms 0ms ocaml 5.3.0
acton 1.act 478ms 5.0ms 12.1MB 517ms 73ms acton 0.30.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 1803ms 29ms 547.7MB 1730ms 57ms ocaml 5.3.0
ocaml 2.ml 3669ms 69ms 19.0MB 3653ms 0ms ocaml 5.3.0
acton 1.act 8124ms 92ms 725.4MB 10360ms 120ms acton 0.30.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 424ms 2.5ms 133.8MB 393ms 13ms ocaml 5.3.0
ocaml 2.ml 745ms 19ms 9.3MB 730ms 0ms ocaml 5.3.0
acton 1.act 1965ms 40ms 250.3MB 2377ms 47ms acton 0.30.0

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 6927ms 135ms 485.2MB 6767ms 147ms ocaml 5.3.0
acton 1.act timeout (120s) — — — — acton 0.30.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 707ms 9.4ms 57.3MB 673ms 17ms ocaml 5.3.0
acton 1-m.act 12513ms 174ms 101.1MB 20447ms 570ms acton 0.30.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 11056ms 13ms 4.6MB 11043ms 0ms ocaml 5.3.0
acton 1-m.act 105769ms 1188ms 5.7MB 163880ms 10223ms acton 0.30.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 2773ms 3.9ms 4.1MB 2760ms 0ms ocaml 5.3.0
acton 1-m.act 26160ms 70ms 8.7MB 38903ms 3493ms acton 0.30.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 702ms 3.3ms 3.3MB 687ms 0ms ocaml 5.3.0
acton 1.act 6035ms 45ms 4.4MB 7950ms 1010ms acton 0.30.0