Programming Language and compiler
Benchmarks

OCaml VS Java 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
java 2.java 458ms 6.7ms 574.1MB 563ms 77ms openjdk 21
java 2-m.java 466ms 7.3ms 643.0MB 657ms 117ms graal/jvm 17.0.8
java 2.java 468ms 2.3ms 638.7MB 577ms 87ms openjdk 23
java 2.java 1195ms 46ms 1101.7MB 577ms 787ms openjdk/zgc 21
ocaml 1.ml 3022ms 19ms 157.1MB 2943ms 60ms ocaml 5.3.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2.java 128ms 1.6ms 167.0MB 157ms 33ms openjdk 21
java 2.java 133ms 5.7ms 96.5MB 163ms 30ms openjdk 23
java 2-m.java 152ms 7.0ms 215.4MB 227ms 57ms graal/jvm 17.0.8
ocaml 1.ml 219ms 1.7ms 19.1MB 200ms 3ms ocaml 5.3.0
java 2.java 308ms 9.8ms 241.5MB 170ms 193ms openjdk/zgc 21

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 898ms 11ms 96.1MB 3307ms 40ms graal/jvm 17.0.8
java 1-m.java 988ms 11ms 48.3MB 3657ms 23ms openjdk 21
java 1-m.java 990ms 2.9ms 50.2MB 3640ms 27ms openjdk 23
java 1-m.java 1042ms 3.9ms 45.7MB 3403ms 137ms openjdk/zgc 21
ocaml 2.ml 2919ms 5.3ms 4.9MB 2907ms 0ms ocaml 5.3.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 180ms 7.7ms 48.6MB 490ms 20ms openjdk 21
java 1-m.java 198ms 0.9ms 50.3MB 520ms 23ms openjdk 23
java 1-m.java 210ms 5.5ms 95.7MB 587ms 40ms graal/jvm 17.0.8
ocaml 2.ml 245ms 3.9ms 4.9MB 233ms 0ms ocaml 5.3.0
java 1-m.java 311ms 8.8ms 45.9MB 520ms 140ms openjdk/zgc 21

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 6.ml 346ms 1.0ms 24.9MB 333ms 0ms ocaml 5.3.0
java 4.java 447ms 1.7ms 100.5MB 630ms 40ms graal/jvm 17.0.8
java 4.java 454ms 3.1ms 47.5MB 533ms 20ms openjdk 21
java 4.java 471ms 9.6ms 49.1MB 567ms 23ms openjdk 23
java 4.java 572ms 6.6ms 45.1MB 543ms 137ms openjdk/zgc 21

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 6.ml 39ms 0.8ms 7.5MB 30ms 0ms ocaml 5.3.0
java 4.java 122ms 6.1ms 46.5MB 160ms 17ms openjdk 21
java 4-m.java 130ms 1.9ms 47.6MB 180ms 17ms openjdk 23
java 4-m.java 133ms 5.7ms 94.2MB 190ms 33ms graal/jvm 17.0.8
java 4.java 250ms 3.4ms 44.0MB 170ms 140ms openjdk/zgc 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 1.8ms 0.1ms 5.1MB 0ms 0ms ocaml 5.3.0
java 1.java 65ms 2.3ms 53.1MB 68ms 20ms graal/jvm 17.0.8
java 1.java 70ms 6.5ms 44.7MB 80ms 14ms openjdk 23
java 1.java 70ms 4.4ms 43.9MB 76ms 18ms openjdk 21
java 1.java 194ms 7.5ms 43.0MB 86ms 142ms openjdk/zgc 21

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
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
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
ocaml 1.ml 77ms 1.7ms 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
java 1.java 404ms 4.9ms 534.3MB 500ms 93ms openjdk 23
java 1.java 406ms 4.3ms 679.8MB 490ms 90ms openjdk 21
java 1-m.java 408ms 8.7ms 626.3MB 617ms 97ms graal/jvm 17.0.8
java 1.java 1026ms 1.9ms 933.9MB 487ms 690ms openjdk/zgc 21
ocaml 1.ml 1089ms 3.3ms 70.2MB 1053ms 20ms ocaml 5.3.0
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
java 1-m.java 167ms 1.6ms 206.1MB 240ms 43ms openjdk 21
java 1-m.java 168ms 1.1ms 158.3MB 247ms 40ms openjdk 23
java 1-m.java 216ms 12ms 253.2MB 367ms 60ms graal/jvm 17.0.8
ocaml 2.ml 366ms 7.2ms 27.6MB 343ms 10ms ocaml 5.3.0
java 1.java 419ms 8.2ms 341.9MB 217ms 280ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 379ms 1.8ms 5.2MB 370ms 0ms ocaml 5.3.0
java 1.java 445ms 0.4ms 45.0MB 490ms 13ms openjdk 21
java 1.java 446ms 3.8ms 48.4MB 477ms 20ms openjdk 23
java 1.java 447ms 2.3ms 82.2MB 477ms 27ms graal/jvm 17.0.8
java 1.java 577ms 2.1ms 44.8MB 497ms 140ms openjdk/zgc 21
java 2.java 1252ms 5.6ms 639.9MB 1390ms 87ms openjdk 21
java 2.java 1277ms 19ms 794.0MB 1390ms 113ms openjdk 23
java 2.java 3274ms 53ms 2445.6MB 1653ms 1830ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 41ms 1.5ms 5.3MB 30ms 0ms ocaml 5.3.0
java 1.java 120ms 4.0ms 48.0MB 153ms 20ms openjdk 23
java 1.java 122ms 2.1ms 44.9MB 167ms 13ms openjdk 21
java 1-m.java 123ms 4.2ms 81.5MB 157ms 33ms graal/jvm 17.0.8
java 1.java 249ms 3.8ms 44.9MB 157ms 147ms openjdk/zgc 21
java 2-m.java 302ms 22ms 344.8MB 437ms 53ms openjdk 21
java 2-m.java 313ms 7.2ms 400.0MB 443ms 70ms openjdk 23
java 2.java 684ms 17ms 532.7MB 467ms 407ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 410ms 3.5ms 115.8MB 463ms 27ms openjdk 21
java 1.java 424ms 3.9ms 118.5MB 467ms 27ms openjdk 23
java 1.java 587ms 6.0ms 112.8MB 493ms 163ms openjdk/zgc 21
java 1-m.java 644ms 25ms 236.7MB 933ms 77ms graal/jvm 17.0.8
java 2.java 782ms 3.1ms 56.9MB 837ms 17ms openjdk 21
java 2.java 786ms 9.6ms 60.5MB 840ms 20ms openjdk 23
java 2.java 847ms 3.9ms 53.2MB 777ms 143ms openjdk/zgc 21
ocaml 1.ml 940ms 9.1ms 541.2MB 883ms 43ms ocaml 5.3.0
java 2-m.java 1339ms 8.3ms 234.5MB 2410ms 100ms graal/jvm 17.0.8
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
java 1.java 155ms 2.3ms 68.1MB 200ms 23ms openjdk 23
java 1.java 158ms 3.5ms 64.7MB 210ms 20ms openjdk 21
ocaml 1.ml 178ms 1.2ms 142.2MB 157ms 10ms ocaml 5.3.0
java 1-m.java 210ms 6.9ms 124.8MB 297ms 47ms graal/jvm 17.0.8
java 2.java 262ms 3.1ms 50.5MB 310ms 23ms openjdk 23
java 2.java 263ms 1.2ms 50.0MB 327ms 20ms openjdk 21
java 1.java 286ms 4.1ms 61.5MB 203ms 150ms openjdk/zgc 21
java 2.java 370ms 2.8ms 47.7MB 303ms 147ms openjdk/zgc 21
java 2-m.java 470ms 6.2ms 199.2MB 830ms 63ms graal/jvm 17.0.8
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
java 3.java timeout 0.0ms 399.2MB 5400ms 90ms graal/jvm 17.0.8
java 3.java timeout 0.0ms 302.2MB 5327ms 60ms openjdk 21
java 3.java timeout 0.0ms 305.0MB 5323ms 63ms openjdk 23
java 3.java timeout 0.0ms 468.6MB 4970ms 293ms openjdk/zgc 21
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
ocaml 2.ml 549ms 15ms 57.1MB 513ms 23ms ocaml 5.3.0
java 3-m.java 772ms 8.0ms 176.1MB 1150ms 57ms graal/jvm 17.0.8
java 3-m.java 798ms 9.3ms 128.8MB 1187ms 37ms openjdk 21
java 3-m.java 805ms 18ms 132.4MB 1233ms 43ms openjdk 23
java 3.java 985ms 10ms 133.8MB 1160ms 190ms openjdk/zgc 21

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 1987ms 7.3ms 47.4MB 7587ms 27ms openjdk 21
java 2-m.java 2001ms 11ms 48.8MB 7653ms 27ms openjdk 23
java 2-m.java 2120ms 12ms 45.2MB 7633ms 150ms openjdk/zgc 21
java 2-m.java 2521ms 48ms 94.9MB 9407ms 50ms graal/jvm 17.0.8
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
java 2-m.java 605ms 4.2ms 47.7MB 2140ms 20ms openjdk 21
java 2-m.java 617ms 2.8ms 48.8MB 2187ms 20ms openjdk 23
java 2-m.java 732ms 8.1ms 45.3MB 2153ms 147ms openjdk/zgc 21
java 2-m.java 776ms 4.7ms 95.1MB 2737ms 43ms graal/jvm 17.0.8
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
java 2-m.java 248ms 5.2ms 47.7MB 723ms 20ms openjdk 21
java 2-m.java 267ms 4.0ms 48.4MB 787ms 20ms openjdk 23
ocaml 2.ml 295ms 7.0ms 5.2MB 287ms 0ms ocaml 5.3.0
java 2-m.java 323ms 9.1ms 94.0MB 987ms 43ms graal/jvm 17.0.8
java 2-m.java 387ms 8.0ms 45.5MB 783ms 147ms openjdk/zgc 21