Programming Language and compiler
Benchmarks

Ruby VS Java benchmarks

Current benchmark data was generated on Mon Apr 14 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 461ms 12ms 574.0MB 563ms 83ms openjdk 21
java 2.java 480ms 4.7ms 624.4MB 600ms 97ms openjdk 23
java 2-m.java 481ms 6.8ms 642.9MB 670ms 120ms graal/jvm 17.0.8
java 2.java 1174ms 6.5ms 1067.3MB 593ms 750ms openjdk/zgc 21
ruby 1.rb 4815ms 21ms 109.4MB 4710ms 90ms ruby/yjit 3.4.2
ruby 1.rb timeout 0.0ms 70.5MB 4953ms 37ms ruby 3.4.2
ruby 1.rb timeout 0.0ms 758.8MB 6567ms 693ms truffleruby 24.2.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2.java 125ms 2.4ms 165.6MB 157ms 30ms openjdk 21
java 2.java 135ms 5.3ms 96.2MB 173ms 27ms openjdk 23
java 2-m.java 150ms 5.9ms 224.4MB 227ms 53ms graal/jvm 17.0.8
java 2.java 304ms 2.2ms 241.6MB 157ms 203ms openjdk/zgc 21
ruby 1.rb 492ms 5.0ms 20.4MB 467ms 10ms ruby/yjit 3.4.2
ruby 1-m.rb 537ms 66ms 418.7MB 1060ms 157ms truffleruby 24.2.0
ruby 1.rb 937ms 8.8ms 19.6MB 910ms 13ms ruby 3.4.2

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 1460ms 7.9ms 63.8MB 1380ms 63ms ruby/yjit 3.4.2
ruby 1.rb 1856ms 18ms 63.1MB 1783ms 60ms ruby 3.4.2
java 1-m.java 2190ms 231ms 262.9MB 8233ms 147ms openjdk 21
java 1-m.java 2460ms 195ms 242.5MB 9323ms 150ms openjdk 23
java 1-m.java 2832ms 160ms 1240.0MB 9087ms 1107ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 357.5MB 4680ms 1437ms truffleruby 24.2.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 155ms 0.2ms 25.8MB 127ms 17ms ruby/yjit 3.4.2
ruby 1.rb 180ms 0.8ms 25.1MB 150ms 17ms ruby 3.4.2
java 1-m.java 447ms 11ms 94.5MB 1460ms 67ms openjdk 23
java 1-m.java 509ms 45ms 129.8MB 1697ms 60ms openjdk 21
java 1-m.java 673ms 33ms 223.7MB 1810ms 260ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 332.3MB 4803ms 1357ms truffleruby 24.2.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4.java 446ms 6.7ms 102.7MB 630ms 37ms graal/jvm 17.0.8
java 4.java 453ms 2.9ms 47.7MB 537ms 17ms openjdk 21
java 4.java 462ms 5.5ms 49.0MB 553ms 20ms openjdk 23
java 4.java 574ms 8.7ms 45.3MB 550ms 140ms openjdk/zgc 21
ruby 6.rb 2050ms 4.6ms 23.0MB 2020ms 13ms ruby/yjit 3.4.2
ruby 6-m.rb 2229ms 245ms 437.5MB 5773ms 363ms truffleruby 24.2.0
ruby 6.rb 3848ms 19ms 22.4MB 3823ms 13ms ruby 3.4.2

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4.java 125ms 2.4ms 46.7MB 167ms 20ms openjdk 21
java 4.java 134ms 2.5ms 47.9MB 180ms 20ms openjdk 23
java 4-m.java 134ms 4.6ms 91.8MB 193ms 37ms graal/jvm 17.0.8
java 4.java 250ms 3.6ms 43.9MB 170ms 137ms openjdk/zgc 21
ruby 6.rb 267ms 5.3ms 15.0MB 250ms 0ms ruby/yjit 3.4.2
ruby 6.rb 439ms 1.1ms 14.5MB 420ms 3ms ruby 3.4.2
ruby 6-m.rb 828ms 16ms 375.5MB 2057ms 180ms truffleruby 24.2.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 35ms 0.5ms 141.8MB 14ms 24ms truffleruby 24.2.0
ruby 1.rb 51ms 1.1ms 12.9MB 38ms 0ms ruby 3.4.2
ruby 1.rb 53ms 1.6ms 13.1MB 38ms 2ms ruby/yjit 3.4.2
java 1.java 63ms 1.5ms 52.7MB 70ms 20ms graal/jvm 17.0.8
java 1.java 72ms 3.3ms 44.4MB 74ms 20ms openjdk 23
java 1.java 73ms 1.7ms 43.8MB 80ms 14ms openjdk 21
java 1.java 193ms 6.2ms 43.0MB 84ms 140ms openjdk/zgc 21

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 249ms 0.3ms 29.0MB 220ms 13ms ruby/yjit 3.4.2
ruby 1.rb 254ms 0.5ms 27.4MB 220ms 20ms ruby 3.4.2
ruby 1-m.rb 4445ms 295ms 567.1MB 11670ms 337ms truffleruby 24.2.0

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 2093ms 6.5ms 135.0MB 2003ms 77ms ruby/yjit 3.4.2
ruby 1.rb 2093ms 7.0ms 134.5MB 2003ms 73ms ruby 3.4.2
ruby 1.rb timeout 0.0ms 522.9MB 13260ms 347ms truffleruby 24.2.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 334ms 6.3ms 13.5MB 317ms 3ms ruby/yjit 3.4.2
ruby 1.rb 528ms 4.6ms 12.9MB 513ms 3ms ruby 3.4.2
ruby 1-m.rb 680ms 43ms 373.6MB 1197ms 137ms truffleruby 24.2.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 883ms 3.5ms 13.5MB 860ms 10ms ruby/yjit 3.4.2
ruby 1-m.rb 1207ms 46ms 407.2MB 1677ms 157ms truffleruby 24.2.0
ruby 1.rb 1475ms 9.5ms 13.0MB 1453ms 10ms ruby 3.4.2

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 192ms 1.4ms 13.5MB 177ms 7ms ruby/yjit 3.4.2
ruby 1.rb 294ms 2.8ms 12.9MB 280ms 3ms ruby 3.4.2
ruby 1-m.rb 515ms 15ms 357.6MB 1040ms 137ms truffleruby 24.2.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 413ms 2.5ms 537.5MB 517ms 87ms openjdk 23
java 1.java 423ms 5.1ms 677.8MB 480ms 113ms openjdk 21
java 1-m.java 427ms 10ms 641.7MB 603ms 127ms graal/jvm 17.0.8
java 1.java 1047ms 30ms 965.9MB 463ms 723ms openjdk/zgc 21
ruby 1-m.rb 4155ms 538ms 542.6MB 10537ms 360ms truffleruby 24.2.0
ruby 1.rb timeout 0.0ms 93.6MB 4933ms 50ms ruby 3.4.2
ruby 1.rb timeout 0.0ms 94.1MB 4943ms 40ms ruby/yjit 3.4.2

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 171ms 3.8ms 206.1MB 240ms 50ms openjdk 21
java 1-m.java 171ms 0.9ms 158.6MB 250ms 43ms openjdk 23
java 1-m.java 215ms 11ms 253.5MB 353ms 63ms graal/jvm 17.0.8
java 1.java 424ms 13ms 341.9MB 223ms 283ms openjdk/zgc 21
ruby 1-m.rb 2026ms 131ms 594.1MB 5157ms 270ms truffleruby 24.2.0
ruby 1.rb 3422ms 26ms 38.3MB 3383ms 23ms ruby/yjit 3.4.2
ruby 1.rb 4463ms 59ms 37.8MB 4427ms 27ms ruby 3.4.2

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 449ms 6.5ms 81.4MB 477ms 30ms graal/jvm 17.0.8
java 1.java 451ms 0.4ms 48.3MB 487ms 17ms openjdk 23
java 1.java 457ms 15ms 45.3MB 490ms 17ms openjdk 21
java 1.java 571ms 1.4ms 44.9MB 493ms 137ms openjdk/zgc 21
ruby 2.rb 825ms 4.5ms 309.8MB 1053ms 117ms truffleruby 24.2.0
java 2.java 1260ms 11ms 640.1MB 1390ms 87ms openjdk 21
java 2.java 1275ms 9.1ms 826.3MB 1380ms 123ms openjdk 23
java 2.java 3279ms 125ms 2446.0MB 1647ms 1853ms openjdk/zgc 21
ruby 2.rb timeout 0.0ms 12.9MB 4987ms 0ms ruby 3.4.2
ruby 2.rb timeout 0.0ms 13.5MB 4983ms 3ms ruby/yjit 3.4.2

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 118ms 2.8ms 81.5MB 143ms 30ms graal/jvm 17.0.8
java 1.java 123ms 2.0ms 45.2MB 163ms 20ms openjdk 21
java 1.java 124ms 4.2ms 48.2MB 157ms 20ms openjdk 23
java 1.java 251ms 4.1ms 44.9MB 173ms 140ms openjdk/zgc 21
java 2-m.java 305ms 5.3ms 394.5MB 447ms 60ms openjdk 21
ruby 2-m.rb 308ms 6.2ms 310.0MB 540ms 117ms truffleruby 24.2.0
java 2-m.java 328ms 5.1ms 392.1MB 470ms 70ms openjdk 23
java 2.java 687ms 2.7ms 524.4MB 477ms 407ms openjdk/zgc 21
ruby 2.rb 1062ms 3.2ms 13.5MB 1047ms 3ms ruby/yjit 3.4.2
ruby 2.rb 2806ms 75ms 12.9MB 2787ms 3ms ruby 3.4.2

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 431ms 12ms 115.9MB 483ms 23ms openjdk 21
java 1.java 477ms 33ms 118.4MB 523ms 27ms openjdk 23
java 1-m.java 620ms 8.0ms 218.4MB 897ms 63ms graal/jvm 17.0.8
java 1.java 625ms 9.3ms 112.7MB 537ms 163ms openjdk/zgc 21
java 2.java 782ms 2.9ms 56.8MB 840ms 17ms openjdk 21
java 2.java 801ms 16ms 60.2MB 853ms 20ms openjdk 23
java 2.java 850ms 3.1ms 53.3MB 780ms 147ms openjdk/zgc 21
java 2-m.java 1327ms 5.9ms 242.0MB 2380ms 100ms graal/jvm 17.0.8
ruby 1.rb timeout 0.0ms 325.4MB 4860ms 130ms ruby 3.4.2
ruby 1.rb timeout 0.0ms 327.0MB 4853ms 137ms ruby/yjit 3.4.2
ruby 1.rb timeout 0.0ms 703.0MB 5090ms 140ms truffleruby 24.2.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 154ms 3.2ms 64.7MB 203ms 20ms openjdk 21
java 1.java 160ms 4.0ms 68.3MB 207ms 20ms openjdk 23
java 1-m.java 205ms 7.0ms 124.6MB 293ms 37ms graal/jvm 17.0.8
java 2.java 265ms 1.0ms 49.9MB 323ms 27ms openjdk 21
java 2.java 271ms 2.5ms 50.6MB 327ms 23ms openjdk 23
java 1.java 288ms 1.8ms 61.5MB 213ms 147ms openjdk/zgc 21
java 2.java 374ms 4.3ms 47.6MB 313ms 143ms openjdk/zgc 21
java 2-m.java 478ms 6.0ms 149.5MB 853ms 60ms graal/jvm 17.0.8
ruby 1.rb 1725ms 19ms 476.7MB 2387ms 160ms truffleruby 24.2.0
ruby 1.rb 3412ms 46ms 131.8MB 3323ms 73ms ruby/yjit 3.4.2
ruby 1.rb 4494ms 36ms 131.1MB 4403ms 77ms ruby 3.4.2

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 3224ms 1.3ms 443.5MB 3647ms 100ms graal/jvm 17.0.8
java 1.java 3724ms 86ms 425.6MB 4620ms 100ms openjdk 21
java 1.java 3773ms 21ms 441.7MB 4677ms 123ms openjdk 23
java 1.java timeout 0.0ms 1810.6MB 4800ms 1133ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 46.6MB 4920ms 60ms ruby 3.4.2
ruby 1.rb timeout 0.0ms 127.6MB 4830ms 157ms ruby/yjit 3.4.2
ruby 1.rb timeout 0.0ms 437.3MB 13257ms 400ms truffleruby 24.2.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 896ms 7.7ms 441.5MB 1250ms 83ms graal/jvm 17.0.8
java 1-m.java 1025ms 8.5ms 437.3MB 1870ms 107ms openjdk 23
java 1-m.java 1037ms 25ms 375.5MB 1830ms 100ms openjdk 21
ruby 1.rb 1663ms 2.6ms 46.0MB 1623ms 27ms ruby 3.4.2
ruby 1.rb 1695ms 86ms 126.8MB 1620ms 60ms ruby/yjit 3.4.2
ruby 1-m.rb 1731ms 175ms 412.7MB 4540ms 227ms truffleruby 24.2.0
java 1.java 2051ms 1.9ms 1354.1MB 1723ms 1100ms 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 1996ms 8.8ms 47.7MB 7623ms 27ms openjdk 21
java 2-m.java 2011ms 5.1ms 48.3MB 7643ms 27ms openjdk 23
java 2-m.java 2140ms 20ms 45.4MB 7653ms 150ms openjdk/zgc 21
java 2-m.java 2509ms 8.6ms 94.2MB 9357ms 43ms graal/jvm 17.0.8
ruby 4.rb timeout 0.0ms 13.0MB 4983ms 3ms ruby 3.4.2
ruby 4.rb timeout 0.0ms 13.5MB 4983ms 7ms ruby/yjit 3.4.2
ruby 4.rb timeout 0.0ms 434.6MB 5167ms 233ms truffleruby 24.2.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 607ms 5.8ms 47.6MB 2140ms 23ms openjdk 21
java 2-m.java 621ms 7.5ms 48.9MB 2170ms 23ms openjdk 23
java 2-m.java 743ms 7.4ms 45.4MB 2183ms 143ms openjdk/zgc 21
java 2-m.java 769ms 3.8ms 95.1MB 2703ms 37ms graal/jvm 17.0.8
ruby 4.rb 4868ms 23ms 439.6MB 5153ms 217ms truffleruby 24.2.0
ruby 4.rb timeout 0.0ms 13.0MB 4987ms 3ms ruby 3.4.2
ruby 4.rb timeout 0.0ms 13.5MB 4980ms 3ms ruby/yjit 3.4.2

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 248ms 3.4ms 47.9MB 757ms 17ms openjdk 21
java 2-m.java 270ms 8.8ms 48.8MB 790ms 27ms openjdk 23
java 2-m.java 321ms 25ms 94.1MB 983ms 40ms graal/jvm 17.0.8
java 2-m.java 400ms 6.1ms 45.6MB 820ms 153ms openjdk/zgc 21
ruby 4.rb 1435ms 5.1ms 375.6MB 1770ms 137ms truffleruby 24.2.0
ruby 4.rb timeout 0.0ms 13.0MB 4983ms 3ms ruby 3.4.2
ruby 4.rb timeout 0.0ms 13.8MB 4980ms 3ms ruby/yjit 3.4.2