Programming Language and compiler
Benchmarks

Ruby VS Java benchmarks

Current benchmark data was generated on Sun Jun 01 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 455ms 6.3ms 576.1MB 557ms 80ms openjdk 21
java 2-m.java 462ms 6.4ms 643.1MB 673ms 90ms graal/jvm 17.0.8
java 2.java 470ms 9.4ms 639.7MB 570ms 97ms openjdk 23
java 2.java 1207ms 20ms 1063.7MB 580ms 793ms openjdk/zgc 21
ruby 1-m.rb 4549ms 73ms 838.0MB 6403ms 490ms truffleruby 24.2.1
ruby 1.rb 4697ms 113ms 110.0MB 4607ms 77ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 70.4MB 4953ms 37ms ruby 3.4.4

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2.java 124ms 1.6ms 167.0MB 157ms 27ms openjdk 21
java 2.java 129ms 5.5ms 98.0MB 163ms 23ms openjdk 23
java 2-m.java 143ms 3.2ms 224.5MB 217ms 53ms graal/jvm 17.0.8
java 2.java 299ms 4.1ms 241.7MB 157ms 197ms openjdk/zgc 21
ruby 1.rb 489ms 7.3ms 20.3MB 463ms 10ms ruby/yjit 3.4.4
ruby 1-m.rb 502ms 12ms 405.6MB 983ms 153ms truffleruby 24.2.1
ruby 1.rb 948ms 7.8ms 19.5MB 927ms 10ms ruby 3.4.4

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 1405ms 6.4ms 63.8MB 1330ms 60ms ruby/yjit 3.4.4
ruby 1.rb 1867ms 34ms 63.0MB 1787ms 63ms ruby 3.4.4
java 1-m.java 2098ms 184ms 258.2MB 7953ms 127ms openjdk 21
java 1-m.java 2459ms 233ms 242.9MB 9360ms 137ms openjdk 23
java 1-m.java 2764ms 212ms 1176.7MB 8893ms 1110ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 348.7MB 4700ms 1477ms truffleruby 24.2.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 152ms 1.3ms 25.6MB 123ms 13ms ruby/yjit 3.4.4
ruby 1.rb 182ms 1.0ms 25.0MB 150ms 13ms ruby 3.4.4
java 1-m.java 443ms 2.6ms 92.2MB 1470ms 60ms openjdk 23
java 1-m.java 479ms 10ms 129.7MB 1607ms 73ms openjdk 21
java 1-m.java 684ms 24ms 228.2MB 1873ms 250ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 356.8MB 4790ms 1430ms truffleruby 24.2.1

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4-m.java 449ms 13ms 102.4MB 637ms 37ms graal/jvm 17.0.8
java 4.java 456ms 17ms 47.5MB 543ms 17ms openjdk 21
java 4.java 458ms 1.4ms 49.3MB 540ms 20ms openjdk 23
java 4.java 569ms 8.4ms 45.4MB 537ms 140ms openjdk/zgc 21
ruby 6.rb 2020ms 7.1ms 23.0MB 1993ms 13ms ruby/yjit 3.4.4
ruby 6-m.rb 2228ms 213ms 408.8MB 5793ms 337ms truffleruby 24.2.1
ruby 6.rb 3691ms 14ms 22.4MB 3667ms 10ms ruby 3.4.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4.java 121ms 1.3ms 46.2MB 157ms 23ms openjdk 21
java 4.java 126ms 2.1ms 47.7MB 167ms 17ms openjdk 23
java 4-m.java 134ms 6.0ms 91.7MB 200ms 27ms graal/jvm 17.0.8
java 4.java 251ms 9.3ms 43.9MB 163ms 147ms openjdk/zgc 21
ruby 6.rb 255ms 2.3ms 15.2MB 240ms 0ms ruby/yjit 3.4.4
ruby 6.rb 420ms 5.4ms 14.5MB 403ms 0ms ruby 3.4.4
ruby 6-m.rb 729ms 109ms 365.6MB 1803ms 163ms truffleruby 24.2.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 34ms 0.5ms 141.5MB 10ms 26ms truffleruby 24.2.1
ruby 1.rb 50ms 1.4ms 12.9MB 38ms 2ms ruby/yjit 3.4.4
ruby 1.rb 51ms 1.7ms 12.8MB 36ms 2ms ruby 3.4.4
java 1.java 62ms 2.4ms 52.7MB 68ms 18ms graal/jvm 17.0.8
java 1.java 69ms 6.7ms 43.8MB 78ms 12ms openjdk 21
java 1.java 73ms 1.7ms 44.5MB 74ms 16ms openjdk 23
java 1.java 184ms 2.0ms 42.9MB 80ms 132ms 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 247ms 0.5ms 27.5MB 220ms 10ms ruby 3.4.4
ruby 1.rb 249ms 5.5ms 27.8MB 220ms 13ms ruby/yjit 3.4.4
ruby 1-m.rb 4414ms 177ms 502.4MB 11650ms 337ms truffleruby 24.2.1

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 2068ms 11ms 135.0MB 1977ms 77ms ruby/yjit 3.4.4
ruby 1.rb 2084ms 23ms 133.9MB 2000ms 73ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 515.9MB 13230ms 373ms truffleruby 24.2.1

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 345ms 2.2ms 13.5MB 327ms 10ms ruby/yjit 3.4.4
ruby 1.rb 531ms 3.8ms 12.9MB 507ms 10ms ruby 3.4.4
ruby 1-m.rb 681ms 22ms 372.4MB 1237ms 140ms truffleruby 24.2.1

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 906ms 5.6ms 13.5MB 890ms 3ms ruby/yjit 3.4.4
ruby 1-m.rb 1181ms 17ms 400.4MB 1707ms 157ms truffleruby 24.2.1
ruby 1.rb 1478ms 4.7ms 12.8MB 1460ms 3ms ruby 3.4.4

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 194ms 1.0ms 13.5MB 177ms 7ms ruby/yjit 3.4.4
ruby 1.rb 292ms 3.6ms 12.8MB 280ms 7ms ruby 3.4.4
ruby 1-m.rb 532ms 4.1ms 356.3MB 1023ms 140ms truffleruby 24.2.1

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 398ms 1.9ms 544.5MB 497ms 87ms openjdk 23
java 1.java 399ms 2.7ms 679.6MB 473ms 90ms openjdk 21
java 1-m.java 404ms 8.2ms 633.5MB 610ms 97ms graal/jvm 17.0.8
java 1.java 1023ms 11ms 974.0MB 463ms 707ms openjdk/zgc 21
ruby 1-m.rb 4042ms 349ms 544.7MB 10327ms 353ms truffleruby 24.2.1
ruby 1.rb timeout 0.0ms 93.5MB 4940ms 47ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 97.4MB 4940ms 47ms ruby/yjit 3.4.4

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 166ms 3.4ms 158.5MB 247ms 40ms openjdk 23
java 1-m.java 170ms 12ms 206.5MB 243ms 43ms openjdk 21
java 1-m.java 213ms 7.0ms 253.5MB 357ms 53ms graal/jvm 17.0.8
java 1.java 412ms 7.1ms 341.9MB 213ms 277ms openjdk/zgc 21
ruby 1-m.rb 2018ms 52ms 569.1MB 5267ms 243ms truffleruby 24.2.1
ruby 1.rb 3259ms 25ms 38.3MB 3220ms 20ms ruby/yjit 3.4.4
ruby 1.rb 4347ms 35ms 37.6MB 4310ms 20ms ruby 3.4.4

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 441ms 1.8ms 45.4MB 480ms 13ms openjdk 21
java 1.java 444ms 1.2ms 48.2MB 480ms 20ms openjdk 23
java 1.java 447ms 3.2ms 81.7MB 483ms 23ms graal/jvm 17.0.8
java 1.java 567ms 1.6ms 45.0MB 490ms 140ms openjdk/zgc 21
ruby 2.rb 823ms 8.8ms 310.2MB 1070ms 110ms truffleruby 24.2.1
java 2.java 1230ms 1.5ms 567.4MB 1367ms 73ms openjdk 21
java 2.java 1245ms 7.7ms 792.1MB 1367ms 93ms openjdk 23
java 2.java 3242ms 30ms 2411.5MB 1663ms 1800ms openjdk/zgc 21
ruby 2.rb timeout 0.0ms 12.8MB 4983ms 3ms ruby 3.4.4
ruby 2.rb timeout 0.0ms 13.5MB 4983ms 3ms ruby/yjit 3.4.4

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 115ms 2.7ms 81.5MB 143ms 27ms graal/jvm 17.0.8
java 1-m.java 117ms 1.5ms 45.3MB 157ms 20ms openjdk 21
java 1.java 118ms 3.8ms 48.1MB 157ms 17ms openjdk 23
java 1.java 241ms 4.9ms 44.6MB 157ms 140ms openjdk/zgc 21
java 2-m.java 289ms 5.6ms 371.1MB 420ms 57ms openjdk 21
java 2-m.java 305ms 7.2ms 418.7MB 450ms 57ms openjdk 23
ruby 2-m.rb 323ms 5.2ms 325.5MB 593ms 110ms truffleruby 24.2.1
java 2.java 680ms 10ms 526.8MB 463ms 403ms openjdk/zgc 21
ruby 2.rb 1025ms 6.4ms 13.5MB 1010ms 3ms ruby/yjit 3.4.4
ruby 2.rb 2919ms 94ms 12.8MB 2903ms 3ms ruby 3.4.4

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 386ms 4.5ms 115.4MB 440ms 17ms openjdk 21
java 1.java 400ms 5.1ms 118.2MB 440ms 23ms openjdk 23
java 1.java 563ms 9.0ms 112.7MB 473ms 163ms openjdk/zgc 21
java 1-m.java 597ms 12ms 270.7MB 853ms 83ms graal/jvm 17.0.8
java 2.java 779ms 4.4ms 60.6MB 827ms 20ms openjdk 23
java 2.java 780ms 4.0ms 57.3MB 843ms 20ms openjdk 21
java 2.java 835ms 8.1ms 53.1MB 767ms 137ms openjdk/zgc 21
java 2-m.java 1339ms 38ms 269.6MB 2393ms 100ms graal/jvm 17.0.8
ruby 1.rb timeout 0.0ms 325.3MB 4850ms 133ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 327.0MB 4847ms 140ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 731.9MB 5060ms 163ms truffleruby 24.2.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 152ms 0.7ms 67.9MB 200ms 17ms openjdk 23
java 1.java 158ms 5.5ms 64.9MB 210ms 17ms openjdk 21
java 1-m.java 199ms 1.5ms 124.8MB 287ms 37ms graal/jvm 17.0.8
java 2.java 256ms 1.2ms 49.8MB 317ms 20ms openjdk 21
java 2.java 260ms 1.5ms 50.4MB 313ms 17ms openjdk 23
java 1.java 281ms 0.9ms 61.2MB 200ms 143ms openjdk/zgc 21
java 2.java 366ms 2.7ms 47.4MB 307ms 137ms openjdk/zgc 21
java 2-m.java 472ms 6.2ms 144.5MB 843ms 60ms graal/jvm 17.0.8
ruby 1-m.rb 1696ms 5.1ms 473.6MB 2500ms 160ms truffleruby 24.2.1
ruby 1.rb 3471ms 137ms 131.8MB 3380ms 80ms ruby/yjit 3.4.4
ruby 1.rb 4452ms 24ms 131.1MB 4367ms 70ms ruby 3.4.4

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 3185ms 10ms 444.0MB 3607ms 107ms graal/jvm 17.0.8
java 1.java 3705ms 65ms 448.5MB 4597ms 110ms openjdk 23
java 1.java 3709ms 72ms 366.5MB 4553ms 107ms openjdk 21
java 1.java timeout 0.0ms 1957.4MB 4627ms 1233ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 130.3MB 4870ms 113ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 131.1MB 4837ms 147ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 465.0MB 13420ms 380ms truffleruby 24.2.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 880ms 4.2ms 369.9MB 1217ms 93ms graal/jvm 17.0.8
java 1-m.java 1000ms 42ms 386.8MB 1787ms 87ms openjdk 21
java 1-m.java 1014ms 24ms 412.8MB 1770ms 97ms openjdk 23
ruby 1-m.rb 1723ms 255ms 383.7MB 4550ms 200ms truffleruby 24.2.1
ruby 1.rb 1760ms 71ms 130.8MB 1653ms 93ms ruby/yjit 3.4.4
ruby 1.rb 1813ms 6.5ms 130.4MB 1677ms 123ms ruby 3.4.4
java 1.java 1993ms 39ms 1355.3MB 1723ms 1037ms 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 1986ms 9.7ms 47.8MB 7600ms 27ms openjdk 21
java 2-m.java 1987ms 18ms 48.7MB 7617ms 30ms openjdk 23
java 2-m.java 2117ms 11ms 45.8MB 7620ms 153ms openjdk/zgc 21
java 2-m.java 2514ms 6.9ms 94.5MB 9423ms 43ms graal/jvm 17.0.8
ruby 4.rb timeout 0.0ms 12.9MB 4983ms 3ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.5MB 4980ms 3ms ruby/yjit 3.4.4
ruby 4.rb timeout 0.0ms 436.2MB 5167ms 233ms truffleruby 24.2.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 599ms 0.5ms 47.8MB 2133ms 23ms openjdk 21
java 2-m.java 614ms 4.8ms 49.0MB 2180ms 20ms openjdk 23
java 2-m.java 737ms 1.7ms 45.5MB 2183ms 140ms openjdk/zgc 21
java 2-m.java 761ms 25ms 95.2MB 2687ms 37ms graal/jvm 17.0.8
ruby 4.rb 4820ms 15ms 423.5MB 5103ms 203ms truffleruby 24.2.1
ruby 4.rb timeout 0.0ms 12.9MB 4987ms 3ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.5MB 4980ms 0ms ruby/yjit 3.4.4

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 249ms 6.5ms 47.4MB 737ms 17ms openjdk 21
java 2-m.java 257ms 2.4ms 48.6MB 783ms 20ms openjdk 23
java 2-m.java 310ms 29ms 95.0MB 947ms 40ms graal/jvm 17.0.8
java 2-m.java 377ms 11ms 45.3MB 767ms 143ms openjdk/zgc 21
ruby 4.rb 1453ms 19ms 405.2MB 1797ms 150ms truffleruby 24.2.1
ruby 4.rb timeout 0.0ms 12.9MB 4983ms 7ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.6MB 4980ms 7ms ruby/yjit 3.4.4