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 Fortran 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
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
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

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

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
fortran 4.f90 177ms 14ms 1.5MB 167ms 0ms gfortran 13.3.0
ocaml 6.ml 349ms 5.9ms 23.0MB 333ms 0ms ocaml 5.3.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
fortran 4.f90 23ms 3.7ms 2.7MB 13ms 0ms gfortran 13.3.0
ocaml 6.ml 41ms 1.4ms 5.5MB 27ms 0ms ocaml 5.3.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
fortran 1.f90 1.7ms 0.3ms 1.6MB 0ms 0ms gfortran 13.3.0
ocaml 1.ml 2.3ms 0.5ms 3.1MB 0ms 0ms ocaml 5.3.0

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

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

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

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

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

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
fortran 2.f90 610ms 47ms 1.5MB 600ms 0ms gfortran 13.3.0
ocaml 1.ml 697ms 7.9ms 2.7MB 687ms 0ms ocaml 5.3.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
fortran 2.f90 65ms 1.1ms 1.6MB 57ms 0ms gfortran 13.3.0
ocaml 1.ml 75ms 1.3ms 2.7MB 67ms 0ms ocaml 5.3.0

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

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

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

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

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
fortran 3-m.f90 6051ms 7.3ms 1.5MB 23903ms 3ms gfortran 13.3.0
ocaml 2.ml 11056ms 13ms 4.6MB 11043ms 0ms ocaml 5.3.0
fortran 2.f90 11153ms 19ms 2.5MB 11143ms 0ms gfortran 13.3.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
fortran 3-m.f90 1522ms 3.5ms 1.5MB 5970ms 3ms gfortran 13.3.0
ocaml 2.ml 2773ms 3.9ms 4.1MB 2760ms 0ms ocaml 5.3.0
fortran 2.f90 2795ms 3.4ms 1.6MB 2783ms 0ms gfortran 13.3.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
fortran 3-m.f90 391ms 2.4ms 1.6MB 1477ms 0ms gfortran 13.3.0
ocaml 2.ml 702ms 3.3ms 3.3MB 687ms 0ms ocaml 5.3.0
fortran 2.f90 703ms 3.3ms 1.5MB 687ms 0ms gfortran 13.3.0