Programming Language and compiler
Benchmarks

OCaml VS D 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
d 1.d 2244ms 4.4ms 312.4MB 2210ms 43ms ldc2 1.41.0
ocaml 1.ml 3028ms 44ms 157.2MB 2940ms 73ms ocaml 5.3.0
d 1.d 3045ms 8.9ms 315.0MB 3220ms 50ms dmd 2.111.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 208ms 3.2ms 207.1MB 190ms 10ms ldc2 1.41.0
ocaml 1.ml 214ms 0.9ms 19.1MB 200ms 0ms ocaml 5.3.0
d 1.d 261ms 1.1ms 208.7MB 237ms 13ms dmd 2.111.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 379ms 0.9ms 3.0MB 1427ms 0ms ldc2 1.41.0
d 2-im.d 1124ms 2.7ms 3.0MB 4320ms 0ms ldc2 1.41.0
d 1-i.d 1487ms 0.9ms 2.9MB 1480ms 0ms ldc2 1.41.0
ocaml 2.ml 2914ms 16ms 4.9MB 2907ms 0ms ocaml 5.3.0
d 1.d 3114ms 14ms 2.9MB 3107ms 0ms ldc2 1.41.0
d 2-i.d 3236ms 19ms 2.9MB 3230ms 0ms ldc2 1.41.0
d 1.d 3542ms 12ms 4.8MB 3533ms 0ms dmd 2.111.0
d 1-im.d 4502ms 67ms 4.8MB 17493ms 7ms dmd 2.111.0
d 1-i.d timeout 0.0ms 4.5MB 4990ms 0ms dmd 2.111.0
d 2-i.d timeout 0.0ms 4.6MB 4990ms 0ms dmd 2.111.0
d 2-im.d timeout 0.0ms 4.9MB 19737ms 17ms dmd 2.111.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 39ms 2.8ms 2.9MB 110ms 0ms ldc2 1.41.0
d 2-im.d 99ms 1.5ms 3.0MB 343ms 0ms ldc2 1.41.0
d 1-i.d 124ms 0.5ms 2.9MB 117ms 0ms ldc2 1.41.0
ocaml 2.ml 245ms 3.3ms 4.9MB 237ms 0ms ocaml 5.3.0
d 1.d 265ms 1.9ms 2.9MB 257ms 0ms ldc2 1.41.0
d 2-i.d 266ms 1.3ms 2.9MB 260ms 0ms ldc2 1.41.0
d 1.d 298ms 3.2ms 4.6MB 290ms 0ms dmd 2.111.0
d 1-im.d 376ms 1.8ms 4.9MB 1430ms 0ms dmd 2.111.0
d 2-im.d 530ms 2.8ms 4.9MB 2010ms 0ms dmd 2.111.0
d 1-i.d 893ms 17ms 4.6MB 883ms 0ms dmd 2.111.0
d 2-i.d 1386ms 12ms 4.5MB 1377ms 0ms dmd 2.111.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 112ms 2.0ms 2.9MB 103ms 0ms ldc2 1.41.0
ocaml 6.ml 347ms 1.7ms 24.8MB 337ms 0ms ocaml 5.3.0
d 1.d 653ms 24ms 4.8MB 643ms 0ms dmd 2.111.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 15ms 1.4ms 2.9MB 10ms 0ms ldc2 1.41.0
ocaml 6.ml 39ms 0.5ms 7.5MB 30ms 0ms ocaml 5.3.0
d 1.d 68ms 1.5ms 4.8MB 60ms 0ms dmd 2.111.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 1.7ms 0.2ms 3.0MB 0ms 0ms ldc2 1.41.0
ocaml 1.ml 1.8ms 0.2ms 5.0MB 0ms 0ms ocaml 5.3.0
d 1.d 1.9ms 0.2ms 5.1MB 0ms 0ms dmd 2.111.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 133ms 2.9ms 5.9MB 127ms 3ms ldc2 1.41.0
d 1.d 175ms 1.0ms 8.0MB 163ms 3ms dmd 2.111.0
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
d 1.d 382ms 1.3ms 5.9MB 370ms 17ms ldc2 1.41.0
d 1.d 515ms 2.4ms 7.9MB 510ms 13ms dmd 2.111.0
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
d 1.d 59ms 1.7ms 6.1MB 50ms 0ms ldc2 1.41.0
ocaml 1.ml 77ms 1.4ms 5.9MB 70ms 0ms ocaml 5.3.0
d 1.d 80ms 1.6ms 8.2MB 70ms 0ms dmd 2.111.0

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
d 1.d 1113ms 6.0ms 312.4MB 1077ms 37ms ldc2 1.41.0
d 1.d 1847ms 15ms 314.6MB 1973ms 47ms dmd 2.111.0
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
d 1.d 226ms 1.5ms 312.5MB 190ms 23ms ldc2 1.41.0
d 1.d 357ms 2.6ms 314.8MB 323ms 30ms dmd 2.111.0
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
d 2.d 361ms 1.5ms 2.9MB 350ms 0ms ldc2 1.41.0
d 1.d 361ms 1.0ms 2.9MB 350ms 0ms ldc2 1.41.0
ocaml 1.ml 373ms 1.9ms 5.2MB 360ms 0ms ocaml 5.3.0
d 1.d 683ms 2.8ms 4.6MB 673ms 0ms dmd 2.111.0
d 2.d 2027ms 4.0ms 4.6MB 2017ms 0ms dmd 2.111.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 38ms 0.4ms 2.9MB 30ms 0ms ldc2 1.41.0
d 2.d 39ms 0.4ms 2.9MB 30ms 0ms ldc2 1.41.0
ocaml 1.ml 41ms 1.4ms 5.2MB 30ms 0ms ocaml 5.3.0
d 1.d 71ms 1.3ms 4.8MB 60ms 0ms dmd 2.111.0
d 2.d 213ms 7.6ms 4.8MB 203ms 0ms dmd 2.111.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 326ms 4.7ms 45.7MB 310ms 0ms ldc2 1.41.0
d 1.d 378ms 9.9ms 79.3MB 360ms 3ms dmd 2.111.0
d 2.d 846ms 1.8ms 49.7MB 827ms 10ms ldc2 1.41.0
ocaml 1.ml 957ms 3.4ms 550.3MB 900ms 43ms ocaml 5.3.0
d 2.d 1175ms 4.5ms 51.7MB 1150ms 13ms dmd 2.111.0
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
d 1.d 62ms 2.9ms 15.7MB 50ms 0ms ldc2 1.41.0
d 1.d 76ms 1.4ms 25.3MB 60ms 0ms dmd 2.111.0
ocaml 1.ml 191ms 3.0ms 141.6MB 170ms 10ms ocaml 5.3.0
d 2.d 212ms 2.5ms 17.7MB 197ms 0ms ldc2 1.41.0
d 2.d 295ms 1.4ms 19.8MB 280ms 0ms dmd 2.111.0
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
d 3.d 579ms 2.7ms 172.3MB 760ms 23ms ldc2 1.41.0
d 3.d 1221ms 2.5ms 175.1MB 1400ms 33ms dmd 2.111.0
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
d 3.d 67ms 4.3ms 28.6MB 73ms 0ms ldc2 1.41.0
d 3.d 131ms 3.2ms 31.5MB 140ms 0ms dmd 2.111.0
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
d 1.d 3601ms 8.6ms 6.1MB 3593ms 0ms ldc2 1.41.0
d 1.d 3668ms 32ms 8.4MB 3657ms 0ms dmd 2.111.0
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
d 1.d 911ms 17ms 3.8MB 900ms 0ms ldc2 1.41.0
d 1.d 915ms 7.3ms 5.4MB 907ms 0ms dmd 2.111.0
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
d 1.d 229ms 1.2ms 3.1MB 220ms 0ms ldc2 1.41.0
d 1.d 235ms 1.0ms 5.0MB 223ms 0ms dmd 2.111.0
ocaml 2.ml 294ms 4.6ms 5.2MB 283ms 0ms ocaml 5.3.0