Programming Language and compiler
Benchmarks

OCaml VS C++ benchmarks

Current benchmark data was generated on Sat Mar 29 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 3076ms 70ms 157.2MB 2993ms 73ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 223ms 5.5ms 19.1MB 203ms 3ms ocaml 5.3.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 400ms 5.9ms 2.5MB 1537ms 0ms g++ 11.4.0
cpp 1-im.cpp 426ms 45ms 4.0MB 1617ms 3ms clang++ 14.0.0-1ubuntu1.1
ocaml 2.ml 2920ms 14ms 4.9MB 2910ms 0ms ocaml 5.3.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1-im.cpp 39ms 0.3ms 2.6MB 130ms 0ms g++ 11.4.0
cpp 1-im.cpp 48ms 15ms 3.9MB 153ms 0ms clang++ 14.0.0-1ubuntu1.1
ocaml 2.ml 246ms 2.4ms 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 0.6ms 24.8MB 333ms 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 0.3ms 7.3MB 30ms 0ms ocaml 5.3.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 1.3ms 0.5ms 1.4MB 0ms 0ms g++ 11.4.0
cpp 1.cpp 1.5ms 0.3ms 2.3MB 0ms 0ms clang++ 14.0.0-1ubuntu1.1
ocaml 1.ml 1.9ms 0.1ms 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 185ms 5.6ms 6.4MB 173ms 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 537ms 16ms 6.6MB 527ms 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 76ms 0.7ms 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 1097ms 8.4ms 70.3MB 1057ms 30ms ocaml 5.3.0
ocaml 2.ml 2087ms 30ms 91.7MB 2037ms 33ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 149ms 1.0ms 21.7MB 133ms 7ms ocaml 5.3.0
ocaml 2.ml 362ms 2.4ms 27.7MB 343ms 3ms ocaml 5.3.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 167ms 0.0ms 1.5MB 160ms 0ms g++ 11.4.0
cpp 0-i.cpp 171ms 0.6ms 2.3MB 160ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 315ms 1.1ms 1.9MB 307ms 0ms g++ 11.4.0
cpp 1.cpp 316ms 1.6ms 2.3MB 310ms 0ms clang++ 14.0.0-1ubuntu1.1
ocaml 1.ml 377ms 1.5ms 5.3MB 367ms 0ms ocaml 5.3.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 0-i.cpp 19ms 0.1ms 1.5MB 10ms 0ms g++ 11.4.0
cpp 0-i.cpp 20ms 0.6ms 2.3MB 10ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 0.4ms 2.3MB 27ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 1.cpp 34ms 1.0ms 1.8MB 30ms 0ms g++ 11.4.0
ocaml 1.ml 40ms 1.1ms 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
cpp 1.cpp 489ms 3.3ms 7.3MB 477ms 0ms g++ 11.4.0
cpp 1.cpp 531ms 3.0ms 7.8MB 520ms 0ms clang++ 14.0.0-1ubuntu1.1
ocaml 1.ml 961ms 7.1ms 552.4MB 900ms 47ms ocaml 5.3.0
ocaml 2.ml 1888ms 3.0ms 18.9MB 1877ms 0ms ocaml 5.3.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 1.cpp 121ms 1.2ms 3.6MB 113ms 0ms g++ 11.4.0
cpp 1.cpp 132ms 1.6ms 4.0MB 120ms 0ms clang++ 14.0.0-1ubuntu1.1
ocaml 1.ml 191ms 10ms 142.3MB 167ms 10ms ocaml 5.3.0
ocaml 2.ml 465ms 0.7ms 9.1MB 457ms 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 474.1MB 4813ms 173ms ocaml 5.3.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 2.ml 550ms 3.3ms 57.1MB 517ms 20ms ocaml 5.3.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 476ms 3.5ms 3.4MB 1840ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 488ms 2.9ms 2.1MB 1890ms 0ms g++ 11.4.0
cpp 6-im.cpp 926ms 1.9ms 2.3MB 3637ms 0ms g++ 11.4.0
cpp 6-im.cpp 928ms 2.0ms 3.4MB 3630ms 0ms clang++ 14.0.0-1ubuntu1.1
ocaml 2.ml 4568ms 13ms 6.4MB 4557ms 0ms ocaml 5.3.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 125ms 0.7ms 3.4MB 457ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 8-m.cpp 129ms 0.8ms 2.0MB 483ms 0ms g++ 11.4.0
cpp 6-im.cpp 239ms 2.6ms 3.4MB 913ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 242ms 3.8ms 2.0MB 923ms 0ms g++ 11.4.0
ocaml 2.ml 1153ms 6.9ms 6.1MB 1143ms 0ms ocaml 5.3.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
cpp 8-m.cpp 39ms 0.1ms 2.0MB 130ms 0ms g++ 11.4.0
cpp 8-m.cpp 39ms 4.1ms 3.4MB 113ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 65ms 0.5ms 3.4MB 227ms 0ms clang++ 14.0.0-1ubuntu1.1
cpp 6-im.cpp 67ms 0.3ms 2.0MB 240ms 0ms g++ 11.4.0
ocaml 2.ml 290ms 2.8ms 5.2MB 280ms 0ms ocaml 5.3.0