Programming Language and compiler
Benchmarks

OCaml VS Swift 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
swift 1.swift 2915ms 17ms 53.9MB 2883ms 17ms swift 6.0.3
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
swift 1.swift 239ms 4.6ms 11.8MB 227ms 0ms swift 6.0.3

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
swift 1.swift 2489ms 22ms 5.8MB 2477ms 0ms swift 6.0.3
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
swift 1.swift 213ms 2.3ms 5.8MB 200ms 0ms swift 6.0.3
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
swift 3-m.swift 135ms 0.8ms 20.7MB 387ms 3ms swift 6.0.3
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
swift 3.swift 37ms 0.1ms 18.2MB 30ms 0ms swift 6.0.3
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
ocaml 1.ml 1.9ms 0.1ms 5.0MB 0ms 0ms ocaml 5.3.0
swift 1.swift 2.6ms 0.2ms 5.9MB 0ms 0ms swift 6.0.3

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
swift 7.swift 346ms 0.4ms 9.8MB 340ms 0ms swift 6.0.3
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
swift 7.swift 39ms 1.0ms 10.0MB 30ms 0ms swift 6.0.3
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
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
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
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
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
ocaml 2.ml 290ms 2.8ms 5.2MB 280ms 0ms ocaml 5.3.0