Programming Language and compiler
Benchmarks

OCaml VS D benchmarks

Current benchmark data was generated on Mon May 19 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 1782ms 3.3ms 312.5MB 1753ms 37ms ldc2 1.40.1
ocaml 1.ml 3022ms 19ms 157.1MB 2943ms 60ms ocaml 5.3.0
d 1.d 3057ms 15ms 314.4MB 3227ms 60ms dmd 2.111.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 167ms 2.7ms 207.7MB 140ms 13ms ldc2 1.40.1
ocaml 1.ml 219ms 1.7ms 19.1MB 200ms 3ms ocaml 5.3.0
d 1.d 262ms 1.0ms 210.5MB 233ms 17ms 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 387ms 21ms 3.0MB 1427ms 0ms ldc2 1.40.1
d 2-im.d 1132ms 37ms 3.0MB 4310ms 0ms ldc2 1.40.1
d 1-i.d 1484ms 1.2ms 2.8MB 1477ms 0ms ldc2 1.40.1
ocaml 2.ml 2919ms 5.3ms 4.9MB 2907ms 0ms ocaml 5.3.0
d 1.d 3132ms 33ms 2.9MB 3123ms 0ms ldc2 1.40.1
d 2-i.d 3237ms 4.9ms 2.9MB 3227ms 0ms ldc2 1.40.1
d 1.d 3534ms 7.1ms 4.6MB 3523ms 0ms dmd 2.111.0
d 1-im.d 4468ms 16ms 4.8MB 17560ms 0ms dmd 2.111.0
d 1-i.d timeout 0.0ms 4.6MB 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 19707ms 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 37ms 0.6ms 3.0MB 110ms 0ms ldc2 1.40.1
d 2-im.d 98ms 2.5ms 3.0MB 350ms 0ms ldc2 1.40.1
d 1-i.d 124ms 0.6ms 2.9MB 120ms 0ms ldc2 1.40.1
ocaml 2.ml 245ms 3.9ms 4.9MB 233ms 0ms ocaml 5.3.0
d 1.d 262ms 2.0ms 2.9MB 250ms 0ms ldc2 1.40.1
d 2-i.d 268ms 1.7ms 2.9MB 260ms 0ms ldc2 1.40.1
d 1.d 295ms 1.4ms 4.6MB 287ms 0ms dmd 2.111.0
d 1-im.d 378ms 2.8ms 4.9MB 1427ms 0ms dmd 2.111.0
d 2-im.d 531ms 3.0ms 4.9MB 2003ms 0ms dmd 2.111.0
d 1-i.d 902ms 8.7ms 4.6MB 893ms 0ms dmd 2.111.0
d 2-i.d 1382ms 5.8ms 4.5MB 1373ms 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 154ms 1.7ms 2.9MB 143ms 0ms ldc2 1.40.1
ocaml 6.ml 346ms 1.0ms 24.9MB 333ms 0ms ocaml 5.3.0
d 1.d 643ms 4.3ms 4.8MB 630ms 0ms dmd 2.111.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 19ms 1.1ms 2.9MB 10ms 0ms ldc2 1.40.1
ocaml 6.ml 39ms 0.8ms 7.5MB 30ms 0ms ocaml 5.3.0
d 1.d 67ms 0.4ms 4.6MB 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 0.1ms 2.9MB 0ms 0ms ldc2 1.40.1
ocaml 1.ml 1.8ms 0.1ms 5.1MB 0ms 0ms ocaml 5.3.0
d 1.d 1.9ms 0.1ms 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 131ms 0.7ms 6.2MB 120ms 0ms ldc2 1.40.1
d 1.d 176ms 0.9ms 8.0MB 167ms 3ms dmd 2.111.0
ocaml 1.ml 178ms 7.5ms 6.6MB 167ms 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 377ms 0.9ms 5.9MB 367ms 13ms ldc2 1.40.1
d 1.d 516ms 1.8ms 8.1MB 510ms 10ms dmd 2.111.0
ocaml 1.ml 536ms 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
d 1.d 56ms 0.4ms 6.1MB 47ms 0ms ldc2 1.40.1
ocaml 1.ml 77ms 1.7ms 5.9MB 70ms 0ms ocaml 5.3.0
d 1.d 79ms 1.8ms 7.9MB 70ms 0ms dmd 2.111.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 968ms 7.6ms 312.4MB 933ms 40ms ldc2 1.40.1
ocaml 1.ml 1089ms 3.3ms 70.2MB 1053ms 20ms ocaml 5.3.0
d 1.d 1870ms 35ms 314.3MB 2007ms 47ms dmd 2.111.0
ocaml 2.ml 2063ms 7.0ms 91.8MB 2010ms 40ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 147ms 2.5ms 21.7MB 130ms 3ms ocaml 5.3.0
d 1.d 199ms 1.4ms 312.5MB 160ms 30ms ldc2 1.40.1
d 1.d 360ms 4.0ms 314.8MB 323ms 33ms dmd 2.111.0
ocaml 2.ml 366ms 7.2ms 27.6MB 343ms 10ms ocaml 5.3.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 360ms 0.1ms 2.9MB 350ms 0ms ldc2 1.40.1
d 1.d 360ms 0.6ms 2.9MB 350ms 0ms ldc2 1.40.1
ocaml 1.ml 379ms 1.8ms 5.2MB 370ms 0ms ocaml 5.3.0
d 1.d 680ms 2.4ms 4.8MB 670ms 0ms dmd 2.111.0
d 2.d 2035ms 5.7ms 4.6MB 2023ms 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 0.1ms 2.9MB 30ms 0ms ldc2 1.40.1
d 2.d 39ms 0.6ms 2.9MB 30ms 0ms ldc2 1.40.1
ocaml 1.ml 41ms 1.5ms 5.3MB 30ms 0ms ocaml 5.3.0
d 1.d 72ms 1.0ms 4.8MB 60ms 0ms dmd 2.111.0
d 2.d 208ms 2.5ms 4.8MB 197ms 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 321ms 12ms 45.7MB 303ms 3ms ldc2 1.40.1
d 1.d 359ms 12ms 79.2MB 347ms 0ms dmd 2.111.0
d 2.d 849ms 1.3ms 47.5MB 830ms 10ms ldc2 1.40.1
ocaml 1.ml 940ms 9.1ms 541.2MB 883ms 43ms ocaml 5.3.0
d 2.d 1178ms 13ms 51.8MB 1160ms 10ms dmd 2.111.0
ocaml 2.ml 1904ms 37ms 19.0MB 1893ms 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 2.0ms 15.7MB 50ms 0ms ldc2 1.40.1
d 1.d 75ms 1.6ms 25.5MB 63ms 0ms dmd 2.111.0
ocaml 1.ml 178ms 1.2ms 142.2MB 157ms 10ms ocaml 5.3.0
d 2.d 210ms 2.6ms 17.6MB 197ms 0ms ldc2 1.40.1
d 2.d 292ms 1.6ms 19.6MB 277ms 0ms dmd 2.111.0
ocaml 2.ml 471ms 3.6ms 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 569ms 12ms 172.2MB 747ms 20ms ldc2 1.40.1
d 3.d 1198ms 6.4ms 175.1MB 1387ms 20ms dmd 2.111.0
ocaml 2.ml timeout 0.0ms 462.8MB 4830ms 157ms ocaml 5.3.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 3.d 63ms 1.2ms 26.2MB 70ms 3ms ldc2 1.40.1
d 3.d 128ms 1.2ms 31.7MB 143ms 0ms dmd 2.111.0
ocaml 2.ml 549ms 15ms 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 3596ms 3.2ms 3.9MB 3583ms 0ms ldc2 1.40.1
d 1.d 3660ms 2.7ms 6.0MB 3650ms 0ms dmd 2.111.0
ocaml 2.ml 4567ms 9.8ms 6.3MB 4560ms 0ms ocaml 5.3.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 902ms 2.2ms 3.5MB 890ms 0ms ldc2 1.40.1
d 1.d 926ms 1.0ms 7.9MB 917ms 0ms dmd 2.111.0
ocaml 2.ml 1147ms 4.8ms 6.1MB 1137ms 0ms ocaml 5.3.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 228ms 0.6ms 3.1MB 220ms 0ms ldc2 1.40.1
d 1.d 234ms 1.2ms 4.9MB 223ms 0ms dmd 2.111.0
ocaml 2.ml 295ms 7.0ms 5.2MB 287ms 0ms ocaml 5.3.0