Programming Language and compiler
Benchmarks

OCaml VS Chapel benchmarks

Current benchmark data was generated on Tue Jul 01 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
chapel 4.chpl 1970ms 8.4ms 62.3MB 1960ms 3ms chpl 1.31.0
chapel 3.chpl 2062ms 35ms 62.3MB 2057ms 0ms chpl 1.31.0
ocaml 1.ml 3177ms 13ms 157.2MB 3097ms 63ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
chapel 3.chpl 188ms 2.0ms 32.3MB 180ms 0ms chpl 1.31.0
chapel 4.chpl 196ms 20ms 32.3MB 190ms 0ms chpl 1.31.0
ocaml 1.ml 234ms 3.5ms 19.2MB 217ms 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 2910ms 4.7ms 4.9MB 2900ms 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 1.0ms 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
chapel 5-m.chpl 108ms 3.0ms 28.4MB 193ms 0ms chpl 1.31.0
ocaml 6.ml 348ms 0.3ms 24.8MB 337ms 0ms ocaml 5.3.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
chapel 5.chpl 21ms 1.4ms 28.4MB 20ms 0ms chpl 1.31.0
ocaml 6.ml 39ms 0.9ms 7.6MB 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 5.1MB 0ms 0ms ocaml 5.3.0
chapel 1.chpl 11ms 0.4ms 28.8MB 0ms 0ms chpl 1.31.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 180ms 10ms 6.4MB 170ms 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 22ms 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 77ms 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 1078ms 7.3ms 70.2MB 1040ms 27ms ocaml 5.3.0
ocaml 2.ml 2068ms 16ms 91.7MB 2013ms 40ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 145ms 3.7ms 21.7MB 130ms 0ms ocaml 5.3.0
ocaml 2.ml 361ms 9.3ms 27.7MB 340ms 7ms ocaml 5.3.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
chapel 2.chpl 320ms 1.9ms 28.8MB 317ms 0ms chpl 1.31.0
ocaml 1.ml 375ms 3.2ms 5.3MB 363ms 0ms ocaml 5.3.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 41ms 1.9ms 5.2MB 33ms 0ms ocaml 5.3.0
chapel 2.chpl 48ms 4.7ms 28.8MB 43ms 0ms chpl 1.31.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 949ms 8.7ms 543.2MB 887ms 47ms ocaml 5.3.0
ocaml 2.ml 1888ms 14ms 17.7MB 1877ms 0ms ocaml 5.3.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 179ms 2.9ms 142.3MB 157ms 10ms ocaml 5.3.0
ocaml 2.ml 466ms 5.7ms 9.1MB 453ms 0ms ocaml 5.3.0

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
chapel 3.chpl 1397ms 5.8ms 246.1MB 1347ms 40ms chpl 1.31.0
ocaml 2.ml timeout 0.0ms 463.0MB 4823ms 163ms ocaml 5.3.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
chapel 3.chpl 160ms 1.0ms 48.9MB 147ms 10ms chpl 1.31.0
ocaml 2.ml 552ms 6.9ms 57.1MB 520ms 23ms ocaml 5.3.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
chapel 1-m.chpl 1930ms 12ms 28.9MB 3833ms 0ms chpl 1.31.0
chapel 1.chpl 3728ms 14ms 28.8MB 3723ms 0ms chpl 1.31.0
ocaml 2.ml 4567ms 4.6ms 6.4MB 4553ms 0ms ocaml 5.3.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
chapel 1-m.chpl 495ms 2.2ms 28.9MB 960ms 0ms chpl 1.31.0
chapel 1.chpl 941ms 4.2ms 28.8MB 937ms 0ms chpl 1.31.0
ocaml 2.ml 1145ms 4.4ms 6.1MB 1137ms 0ms ocaml 5.3.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
chapel 1-m.chpl 134ms 0.7ms 29.0MB 240ms 0ms chpl 1.31.0
chapel 1.chpl 247ms 0.8ms 28.8MB 240ms 0ms chpl 1.31.0
ocaml 2.ml 291ms 2.2ms 5.2MB 283ms 0ms ocaml 5.3.0