Programming Language and compiler
Benchmarks

OCaml VS C 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
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
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

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

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
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
c 1.c 1.1ms 0.3ms 1.4MB 0ms 0ms zigcc 0.14.1
c 1.c 1.2ms 0.1ms 2.1MB 0ms 0ms gcc 15.1.0
c 1.c 1.3ms 0.1ms 2.1MB 0ms 0ms clang 14.0.0-1ubuntu1.1
ocaml 1.ml 1.8ms 0.2ms 5.0MB 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 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
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
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
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
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
c 8-i.c 266ms 0.5ms 1.5MB 260ms 0ms zigcc 0.14.1
c 8-i.c 301ms 1.1ms 2.1MB 290ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 310ms 1.6ms 2.3MB 300ms 0ms gcc 15.1.0
c 2.c 312ms 0.6ms 1.5MB 300ms 0ms zigcc 0.14.1
c 5.c 313ms 1.3ms 2.3MB 303ms 0ms gcc 15.1.0
c 5.c 317ms 4.2ms 2.1MB 307ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 318ms 0.9ms 1.5MB 310ms 0ms zigcc 0.14.1
c 2.c 320ms 0.6ms 2.1MB 310ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 336ms 0.8ms 2.3MB 330ms 0ms gcc 15.1.0
ocaml 1.ml 373ms 1.9ms 5.2MB 360ms 0ms ocaml 5.3.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 8-i.c 29ms 0.5ms 1.5MB 20ms 0ms zigcc 0.14.1
c 8-i.c 33ms 0.7ms 2.1MB 27ms 0ms clang 14.0.0-1ubuntu1.1
c 2.c 33ms 0.2ms 2.3MB 27ms 0ms gcc 15.1.0
c 5.c 33ms 0.1ms 2.3MB 30ms 0ms gcc 15.1.0
c 2.c 34ms 0.9ms 1.5MB 30ms 0ms zigcc 0.14.1
c 5.c 35ms 0.5ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 5.c 35ms 0.2ms 1.5MB 30ms 0ms zigcc 0.14.1
c 2.c 36ms 1.2ms 2.1MB 30ms 0ms clang 14.0.0-1ubuntu1.1
c 8-i.c 36ms 0.1ms 2.3MB 30ms 0ms gcc 15.1.0
ocaml 1.ml 41ms 1.4ms 5.2MB 30ms 0ms ocaml 5.3.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 1.c 331ms 7.2ms 40.9MB 313ms 3ms gcc 15.1.0
c 1.c 347ms 11ms 40.3MB 330ms 0ms zigcc 0.14.1
c 1.c 362ms 17ms 41.0MB 343ms 7ms clang 14.0.0-1ubuntu1.1
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
c 1.c 52ms 2.1ms 11.6MB 40ms 0ms gcc 15.1.0
c 1.c 53ms 1.8ms 11.7MB 40ms 0ms clang 14.0.0-1ubuntu1.1
c 1.c 56ms 4.4ms 11.0MB 43ms 0ms zigcc 0.14.1
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
c 3-m.c 737ms 1.3ms 2.3MB 2890ms 0ms gcc 15.1.0
c 6-im.c 952ms 0.9ms 2.0MB 3750ms 0ms gcc 15.1.0
c 4-m.c 998ms 13ms 2.0MB 3907ms 0ms gcc 15.1.0
c 6-im.c 1001ms 0.7ms 3.3MB 3937ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 1122ms 4.0ms 3.3MB 4410ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 1144ms 1.6ms 2.0MB 4507ms 0ms gcc 15.1.0
c 5-im.c 1337ms 15ms 3.1MB 5243ms 3ms clang 14.0.0-1ubuntu1.1
c 3-m.c 1838ms 7.0ms 3.1MB 7227ms 7ms clang 14.0.0-1ubuntu1.1
ocaml 2.ml 4582ms 24ms 6.4MB 4570ms 0ms ocaml 5.3.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 194ms 1.1ms 2.0MB 737ms 0ms gcc 15.1.0
c 6-im.c 247ms 2.4ms 2.0MB 940ms 0ms gcc 15.1.0
c 4-m.c 259ms 0.7ms 2.0MB 1000ms 0ms gcc 15.1.0
c 6-im.c 268ms 16ms 3.4MB 1007ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 288ms 1.3ms 3.1MB 1100ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 294ms 0.9ms 2.0MB 1130ms 0ms gcc 15.1.0
c 5-im.c 376ms 62ms 3.3MB 1403ms 7ms clang 14.0.0-1ubuntu1.1
c 3-m.c 469ms 7.4ms 3.3MB 1800ms 0ms clang 14.0.0-1ubuntu1.1
ocaml 2.ml 1159ms 5.5ms 6.1MB 1150ms 0ms ocaml 5.3.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
c 3-m.c 56ms 0.2ms 2.0MB 193ms 0ms gcc 15.1.0
c 6-im.c 69ms 0.2ms 2.0MB 250ms 0ms gcc 15.1.0
c 4-m.c 72ms 0.8ms 2.3MB 260ms 0ms gcc 15.1.0
c 6-im.c 73ms 2.3ms 3.1MB 250ms 0ms clang 14.0.0-1ubuntu1.1
c 4-m.c 79ms 0.7ms 3.0MB 280ms 0ms clang 14.0.0-1ubuntu1.1
c 5-im.c 81ms 0.7ms 2.0MB 293ms 0ms gcc 15.1.0
c 5-im.c 92ms 0.2ms 3.1MB 333ms 0ms clang 14.0.0-1ubuntu1.1
c 3-m.c 123ms 0.9ms 3.3MB 453ms 0ms clang 14.0.0-1ubuntu1.1
ocaml 2.ml 294ms 4.6ms 5.2MB 283ms 0ms ocaml 5.3.0