Programming Language and compiler
Benchmarks

OCaml VS Java 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
java 2.java 464ms 6.6ms 574.2MB 563ms 87ms openjdk 21
java 2.java 479ms 9.1ms 616.4MB 583ms 103ms openjdk 23
java 2-m.java 481ms 19ms 639.3MB 660ms 120ms graal/jvm 17.0.8
java 2.java 1236ms 32ms 1075.1MB 593ms 800ms openjdk/zgc 21
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
java 2.java 126ms 3.2ms 166.9MB 150ms 33ms openjdk 21
java 2-m.java 129ms 10ms 97.1MB 167ms 33ms openjdk 23
java 2-m.java 149ms 2.9ms 225.2MB 223ms 50ms graal/jvm 17.0.8
ocaml 1.ml 223ms 5.5ms 19.1MB 203ms 3ms ocaml 5.3.0
java 2.java 312ms 9.7ms 241.7MB 150ms 213ms 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 892ms 1.5ms 96.4MB 3260ms 40ms graal/jvm 17.0.8
java 1-m.java 951ms 48ms 48.8MB 3533ms 23ms openjdk 21
java 1-m.java 986ms 4.4ms 50.2MB 3620ms 23ms openjdk 23
java 1-m.java 1049ms 7.4ms 45.7MB 3410ms 143ms openjdk/zgc 21
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
java 1-m.java 187ms 7.1ms 48.5MB 477ms 27ms openjdk 21
java 1-m.java 193ms 2.0ms 50.3MB 500ms 23ms openjdk 23
java 1-m.java 198ms 11ms 95.6MB 537ms 47ms graal/jvm 17.0.8
ocaml 2.ml 246ms 2.4ms 4.9MB 237ms 0ms ocaml 5.3.0
java 1-m.java 302ms 10ms 45.6MB 503ms 143ms openjdk/zgc 21

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 6.ml 347ms 0.6ms 24.8MB 333ms 0ms ocaml 5.3.0
java 4-m.java 450ms 7.2ms 101.3MB 637ms 43ms graal/jvm 17.0.8
java 4.java 459ms 3.8ms 49.0MB 550ms 20ms openjdk 23
java 4.java 461ms 6.4ms 47.5MB 547ms 27ms openjdk 21
java 4.java 576ms 6.5ms 45.3MB 553ms 137ms openjdk/zgc 21

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 6.ml 39ms 0.3ms 7.3MB 30ms 0ms ocaml 5.3.0
java 4-m.java 122ms 3.2ms 46.3MB 163ms 20ms openjdk 21
java 4-m.java 131ms 2.3ms 47.9MB 177ms 20ms openjdk 23
java 4-m.java 143ms 7.4ms 92.6MB 210ms 33ms graal/jvm 17.0.8
java 4.java 241ms 8.7ms 44.1MB 157ms 140ms openjdk/zgc 21

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 1.9ms 0.1ms 5.0MB 0ms 0ms ocaml 5.3.0
java 1.java 66ms 0.5ms 52.8MB 68ms 22ms graal/jvm 17.0.8
java 1.java 69ms 3.8ms 43.8MB 76ms 16ms openjdk 21
java 1.java 73ms 1.9ms 44.5MB 74ms 14ms openjdk 23
java 1.java 194ms 3.2ms 42.8MB 80ms 136ms openjdk/zgc 21

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
java 1.java 405ms 1.0ms 680.0MB 473ms 97ms openjdk 21
java 1.java 408ms 3.0ms 544.3MB 507ms 87ms openjdk 23
java 1-m.java 409ms 2.7ms 638.5MB 613ms 100ms graal/jvm 17.0.8
java 1.java 1079ms 14ms 967.6MB 430ms 763ms openjdk/zgc 21
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
java 1-m.java 166ms 3.5ms 159.8MB 240ms 43ms openjdk 23
java 1-m.java 166ms 4.0ms 206.8MB 237ms 47ms openjdk 21
java 1-m.java 213ms 8.8ms 253.3MB 357ms 63ms graal/jvm 17.0.8
ocaml 2.ml 362ms 2.4ms 27.7MB 343ms 3ms ocaml 5.3.0
java 1.java 414ms 4.7ms 341.8MB 220ms 273ms openjdk/zgc 21

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 377ms 1.5ms 5.3MB 367ms 0ms ocaml 5.3.0
java 1.java 445ms 3.1ms 81.4MB 473ms 27ms graal/jvm 17.0.8
java 1.java 448ms 1.2ms 45.5MB 493ms 17ms openjdk 21
java 1.java 450ms 1.9ms 48.1MB 483ms 20ms openjdk 23
java 1.java 570ms 3.2ms 44.7MB 490ms 140ms openjdk/zgc 21
java 2.java 1242ms 14ms 599.7MB 1377ms 87ms openjdk 21
java 2.java 1263ms 11ms 775.7MB 1373ms 113ms openjdk 23
java 2.java 3341ms 60ms 2440.1MB 1657ms 1900ms openjdk/zgc 21

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ocaml 1.ml 40ms 1.1ms 5.2MB 30ms 0ms ocaml 5.3.0
java 1.java 119ms 5.4ms 45.2MB 157ms 17ms openjdk 21
java 1.java 123ms 5.6ms 81.6MB 157ms 27ms graal/jvm 17.0.8
java 1.java 124ms 1.4ms 47.8MB 160ms 20ms openjdk 23
java 1.java 248ms 2.5ms 44.8MB 170ms 137ms openjdk/zgc 21
java 2-m.java 297ms 9.8ms 354.8MB 443ms 57ms openjdk 21
java 2-m.java 322ms 3.6ms 396.6MB 450ms 73ms openjdk 23
java 2.java 694ms 10ms 528.8MB 457ms 420ms openjdk/zgc 21

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 418ms 9.7ms 115.3MB 463ms 27ms openjdk 21
java 1.java 444ms 12ms 118.1MB 487ms 23ms openjdk 23
java 1.java 578ms 14ms 112.6MB 480ms 170ms openjdk/zgc 21
java 1-m.java 640ms 25ms 255.6MB 920ms 80ms graal/jvm 17.0.8
java 2.java 783ms 2.1ms 60.4MB 833ms 20ms openjdk 23
java 2.java 784ms 1.1ms 57.8MB 840ms 20ms openjdk 21
java 2.java 851ms 3.6ms 53.4MB 783ms 150ms openjdk/zgc 21
ocaml 1.ml 961ms 7.1ms 552.4MB 900ms 47ms ocaml 5.3.0
java 2-m.java 1410ms 27ms 288.5MB 2513ms 130ms graal/jvm 17.0.8
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
java 1.java 158ms 2.3ms 68.0MB 200ms 20ms openjdk 23
java 1.java 164ms 3.5ms 65.0MB 220ms 20ms openjdk 21
ocaml 1.ml 191ms 10ms 142.3MB 167ms 10ms ocaml 5.3.0
java 1-m.java 209ms 4.1ms 137.4MB 293ms 43ms graal/jvm 17.0.8
java 2.java 257ms 4.6ms 49.9MB 313ms 20ms openjdk 21
java 2.java 264ms 1.7ms 50.3MB 313ms 20ms openjdk 23
java 1.java 290ms 3.5ms 61.4MB 210ms 147ms openjdk/zgc 21
java 2.java 371ms 2.4ms 47.2MB 310ms 143ms openjdk/zgc 21
ocaml 2.ml 465ms 0.7ms 9.1MB 457ms 0ms ocaml 5.3.0
java 2-m.java 479ms 1.2ms 185.2MB 853ms 57ms graal/jvm 17.0.8

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 406.5MB 5423ms 87ms graal/jvm 17.0.8
java 3.java timeout 0.0ms 302.4MB 5327ms 63ms openjdk 21
java 3.java timeout 0.0ms 304.9MB 5330ms 57ms openjdk 23
java 3.java timeout 0.0ms 468.0MB 4960ms 307ms openjdk/zgc 21
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
java 3-m.java 796ms 14ms 176.2MB 1187ms 57ms graal/jvm 17.0.8
java 3-m.java 802ms 15ms 131.6MB 1220ms 30ms openjdk 21
java 3-m.java 802ms 3.4ms 132.7MB 1237ms 40ms openjdk 23
java 3.java 980ms 26ms 133.2MB 1147ms 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 1989ms 19ms 47.7MB 7560ms 20ms openjdk 21
java 2-m.java 1997ms 1.6ms 49.0MB 7633ms 27ms openjdk 23
java 2-m.java 2134ms 23ms 45.4MB 7440ms 147ms openjdk/zgc 21
java 2-m.java 2523ms 33ms 95.5MB 9413ms 50ms graal/jvm 17.0.8
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
java 2-m.java 605ms 9.9ms 47.7MB 2137ms 27ms openjdk 21
java 2-m.java 616ms 4.1ms 48.4MB 2170ms 23ms openjdk 23
java 2-m.java 730ms 1.3ms 45.4MB 2137ms 150ms openjdk/zgc 21
java 2-m.java 781ms 8.9ms 93.2MB 2740ms 37ms graal/jvm 17.0.8
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
java 2-m.java 255ms 6.3ms 49.0MB 753ms 20ms openjdk 23
java 2-m.java 255ms 9.2ms 47.6MB 763ms 23ms openjdk 21
ocaml 2.ml 290ms 2.8ms 5.2MB 280ms 0ms ocaml 5.3.0
java 2-m.java 319ms 30ms 94.2MB 960ms 40ms graal/jvm 17.0.8
java 2-m.java 382ms 13ms 45.2MB 747ms 153ms openjdk/zgc 21