Programming Language and compiler
Benchmarks

Ruby VS Java benchmarks

Current benchmark data was generated on Tue Mar 25 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 2.4ms 576.1MB 560ms 83ms openjdk 21
java 2-m.java 468ms 4.5ms 644.9MB 643ms 120ms graal/jvm 17.0.8
java 2.java 483ms 9.4ms 620.6MB 587ms 107ms openjdk 23
java 2.java 1240ms 21ms 1086.3MB 587ms 817ms openjdk/zgc 21
ruby 1-m.rb 1604ms 2779ms 798.2MB 6547ms 637ms truffleruby 24.2.0
ruby 1.rb 4929ms 11ms 110.0MB 4830ms 87ms ruby/yjit 3.4.2
ruby 1.rb timeout 0.0ms 70.6MB 4943ms 43ms ruby 3.4.2

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 123ms 4.3ms 98.7MB 163ms 30ms openjdk 23
java 2.java 125ms 5.0ms 169.0MB 153ms 33ms openjdk 21
java 2-m.java 150ms 9.1ms 225.3MB 223ms 57ms graal/jvm 17.0.8
java 2.java 306ms 2.8ms 241.6MB 150ms 210ms openjdk/zgc 21
ruby 1.rb 497ms 4.3ms 20.3MB 473ms 10ms ruby/yjit 3.4.2
ruby 1-m.rb 605ms 52ms 425.3MB 1203ms 173ms truffleruby 24.2.0
ruby 1.rb 935ms 7.2ms 19.6MB 910ms 10ms 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 1467ms 40ms 63.8MB 1387ms 63ms ruby/yjit 3.4.2
ruby 1.rb 1869ms 46ms 63.1MB 1790ms 63ms ruby 3.4.2
java 1-m.java 2416ms 202ms 242.7MB 9177ms 143ms openjdk 23
java 1-m.java 2460ms 134ms 259.7MB 9333ms 137ms openjdk 21
java 1-m.java 2898ms 214ms 1236.9MB 9260ms 1187ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 336.9MB 4703ms 1443ms truffleruby 24.2.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 160ms 2.1ms 25.6MB 123ms 20ms ruby/yjit 3.4.2
ruby 1.rb 180ms 2.8ms 25.1MB 150ms 20ms ruby 3.4.2
java 1-m.java 440ms 30ms 92.7MB 1440ms 60ms openjdk 23
java 1-m.java 488ms 40ms 121.4MB 1617ms 60ms openjdk 21
java 1-m.java 671ms 16ms 222.0MB 1810ms 263ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 333.3MB 4763ms 1447ms truffleruby 24.2.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4.java 445ms 1.1ms 102.4MB 620ms 43ms graal/jvm 17.0.8
java 4.java 456ms 0.4ms 47.7MB 537ms 23ms openjdk 21
java 4.java 456ms 5.6ms 49.1MB 543ms 20ms openjdk 23
java 4.java 571ms 8.5ms 45.1MB 543ms 137ms openjdk/zgc 21
ruby 6.rb 2067ms 17ms 23.0MB 2040ms 13ms ruby/yjit 3.4.2
ruby 6-m.rb 2128ms 75ms 365.9MB 5427ms 350ms truffleruby 24.2.0
ruby 6.rb 3896ms 43ms 22.5MB 3870ms 17ms ruby 3.4.2

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4-m.java 124ms 5.6ms 91.1MB 173ms 30ms graal/jvm 17.0.8
java 4-m.java 125ms 2.1ms 46.7MB 167ms 23ms openjdk 21
java 4.java 127ms 5.7ms 48.5MB 173ms 13ms openjdk 23
java 4.java 246ms 8.1ms 44.0MB 170ms 137ms openjdk/zgc 21
ruby 6.rb 262ms 3.7ms 15.0MB 243ms 7ms ruby/yjit 3.4.2
ruby 6.rb 440ms 7.9ms 14.5MB 420ms 3ms ruby 3.4.2
ruby 6-m.rb 787ms 58ms 380.4MB 1943ms 177ms truffleruby 24.2.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 38ms 1.6ms 142.2MB 14ms 28ms truffleruby 24.2.0
ruby 1.rb 52ms 1.2ms 12.9MB 38ms 4ms ruby 3.4.2
ruby 1.rb 54ms 2.1ms 13.0MB 40ms 2ms ruby/yjit 3.4.2
java 1.java 63ms 2.8ms 52.7MB 70ms 16ms graal/jvm 17.0.8
java 1.java 65ms 2.6ms 43.7MB 74ms 16ms openjdk 21
java 1.java 69ms 4.7ms 44.7MB 72ms 16ms openjdk 23
java 1.java 199ms 6.8ms 42.9MB 84ms 138ms 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 257ms 6.2ms 26.6MB 227ms 17ms ruby 3.4.2
ruby 1.rb 261ms 3.5ms 30.3MB 230ms 13ms ruby/yjit 3.4.2
ruby 1-m.rb 4513ms 198ms 499.5MB 11770ms 350ms truffleruby 24.2.0

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 2094ms 7.7ms 134.5MB 2010ms 67ms ruby 3.4.2
ruby 1.rb 2103ms 13ms 135.5MB 2017ms 70ms ruby/yjit 3.4.2
ruby 1.rb timeout 0.0ms 542.8MB 13190ms 353ms 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 332ms 5.1ms 13.5MB 313ms 0ms ruby/yjit 3.4.2
ruby 1.rb 524ms 1.2ms 13.0MB 510ms 0ms ruby 3.4.2
ruby 1-m.rb 710ms 32ms 365.2MB 1233ms 153ms truffleruby 24.2.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 886ms 4.7ms 13.5MB 863ms 10ms ruby/yjit 3.4.2
ruby 1-m.rb 1259ms 50ms 413.3MB 1827ms 197ms truffleruby 24.2.0
ruby 1.rb 1482ms 23ms 13.0MB 1463ms 7ms ruby 3.4.2

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 195ms 2.2ms 13.5MB 177ms 7ms ruby/yjit 3.4.2
ruby 1.rb 289ms 2.1ms 12.9MB 273ms 0ms ruby 3.4.2
ruby 1-m.rb 514ms 28ms 357.0MB 993ms 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 402ms 1.4ms 539.4MB 503ms 83ms openjdk 23
java 1.java 403ms 0.8ms 679.7MB 470ms 100ms openjdk 21
java 1-m.java 407ms 4.5ms 624.7MB 617ms 97ms graal/jvm 17.0.8
java 1.java 1109ms 14ms 993.0MB 460ms 777ms openjdk/zgc 21
ruby 1-m.rb 3955ms 22ms 606.4MB 10090ms 377ms truffleruby 24.2.0
ruby 1.rb timeout 0.0ms 94.3MB 4940ms 50ms ruby 3.4.2
ruby 1.rb timeout 0.0ms 94.1MB 4933ms 53ms 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 163ms 1.4ms 158.5MB 237ms 47ms openjdk 23
java 1-m.java 167ms 4.0ms 206.4MB 237ms 47ms openjdk 21
java 1-m.java 214ms 4.0ms 253.3MB 350ms 63ms graal/jvm 17.0.8
java 1.java 427ms 11ms 341.8MB 217ms 287ms openjdk/zgc 21
ruby 1-m.rb 2157ms 107ms 616.5MB 5503ms 283ms truffleruby 24.2.0
ruby 1.rb 3496ms 172ms 38.3MB 3457ms 23ms ruby/yjit 3.4.2
ruby 1.rb 4445ms 2.9ms 37.8MB 4413ms 17ms ruby 3.4.2

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 445ms 1.2ms 45.1MB 487ms 17ms openjdk 21
java 1.java 448ms 0.8ms 48.1MB 483ms 20ms openjdk 23
java 1.java 451ms 5.3ms 82.3MB 480ms 30ms graal/jvm 17.0.8
java 1.java 570ms 6.7ms 44.6MB 483ms 140ms openjdk/zgc 21
ruby 2.rb 846ms 5.3ms 311.6MB 1087ms 127ms truffleruby 24.2.0
java 2.java 1247ms 8.3ms 612.0MB 1383ms 87ms openjdk 21
java 2.java 1263ms 12ms 761.8MB 1380ms 107ms openjdk 23
java 2.java 3428ms 91ms 2585.6MB 1647ms 1983ms openjdk/zgc 21
ruby 2.rb timeout 0.0ms 12.9MB 4983ms 7ms ruby 3.4.2
ruby 2.rb timeout 0.0ms 13.5MB 4987ms 0ms ruby/yjit 3.4.2

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 120ms 1.3ms 45.2MB 160ms 20ms openjdk 21
java 1.java 122ms 3.4ms 48.0MB 157ms 17ms openjdk 23
java 1.java 126ms 6.4ms 81.5MB 157ms 30ms graal/jvm 17.0.8
java 1.java 255ms 8.1ms 44.8MB 173ms 147ms openjdk/zgc 21
java 2-m.java 305ms 1.9ms 374.3MB 440ms 63ms openjdk 21
ruby 2-m.rb 313ms 8.1ms 310.0MB 540ms 123ms truffleruby 24.2.0
java 2-m.java 314ms 3.5ms 404.5MB 453ms 67ms openjdk 23
java 2.java 718ms 16ms 545.0MB 480ms 433ms openjdk/zgc 21
ruby 2.rb 1065ms 2.9ms 13.5MB 1043ms 0ms ruby/yjit 3.4.2
ruby 2.rb 2836ms 76ms 12.9MB 2817ms 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 414ms 8.0ms 115.1MB 463ms 23ms openjdk 21
java 1.java 417ms 11ms 118.0MB 453ms 27ms openjdk 23
java 1.java 598ms 4.7ms 112.6MB 497ms 167ms openjdk/zgc 21
java 1-m.java 645ms 4.3ms 256.4MB 920ms 83ms graal/jvm 17.0.8
java 2.java 783ms 3.4ms 57.0MB 837ms 23ms openjdk 21
java 2.java 785ms 6.3ms 60.3MB 833ms 23ms openjdk 23
java 2.java 856ms 3.3ms 53.4MB 780ms 150ms openjdk/zgc 21
java 2-m.java 1326ms 70ms 214.5MB 2320ms 103ms graal/jvm 17.0.8
ruby 1.rb timeout 0.0ms 325.4MB 4847ms 137ms ruby 3.4.2
ruby 1.rb timeout 0.0ms 327.0MB 4840ms 143ms ruby/yjit 3.4.2
ruby 1.rb timeout 0.0ms 707.0MB 5073ms 153ms truffleruby 24.2.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 158ms 11ms 68.1MB 193ms 30ms openjdk 23
java 1.java 159ms 1.7ms 64.7MB 210ms 20ms openjdk 21
java 1-m.java 209ms 17ms 124.7MB 293ms 43ms graal/jvm 17.0.8
java 2.java 261ms 1.6ms 50.5MB 313ms 17ms openjdk 23
java 2.java 261ms 1.8ms 49.9MB 320ms 20ms openjdk 21
java 1.java 292ms 2.3ms 61.4MB 210ms 157ms openjdk/zgc 21
java 2.java 371ms 7.0ms 47.7MB 307ms 143ms openjdk/zgc 21
java 2-m.java 474ms 3.4ms 194.3MB 833ms 70ms graal/jvm 17.0.8
ruby 1-m.rb 1762ms 23ms 498.0MB 2533ms 183ms truffleruby 24.2.0
ruby 1.rb 3732ms 397ms 131.8MB 3640ms 77ms ruby/yjit 3.4.2
ruby 1.rb 4536ms 21ms 131.1MB 4440ms 80ms ruby 3.4.2

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 3250ms 4.4ms 443.6MB 3687ms 107ms graal/jvm 17.0.8
java 1.java 3741ms 68ms 414.0MB 4627ms 120ms openjdk 23
java 1.java 3777ms 87ms 428.4MB 4617ms 110ms openjdk 21
java 1.java timeout 0.0ms 2126.2MB 4680ms 1213ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 46.7MB 4920ms 67ms ruby 3.4.2
ruby 1.rb timeout 0.0ms 123.9MB 4887ms 100ms ruby/yjit 3.4.2
ruby 1.rb timeout 0.0ms 457.3MB 13323ms 400ms truffleruby 24.2.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 904ms 8.4ms 445.7MB 1267ms 97ms graal/jvm 17.0.8
java 1-m.java 1004ms 16ms 422.6MB 1803ms 87ms openjdk 21
java 1-m.java 1030ms 26ms 432.7MB 1780ms 97ms openjdk 23
ruby 1.rb 1685ms 6.0ms 46.0MB 1633ms 37ms ruby 3.4.2
ruby 1-m.rb 1729ms 252ms 405.1MB 4537ms 220ms truffleruby 24.2.0
ruby 1.rb 1798ms 0.8ms 127.8MB 1647ms 133ms ruby/yjit 3.4.2
java 1.java 2045ms 43ms 1343.3MB 1747ms 1080ms 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 1990ms 4.9ms 48.3MB 7590ms 23ms openjdk 21
java 2-m.java 2007ms 4.6ms 48.8MB 7640ms 23ms openjdk 23
java 2-m.java 2118ms 9.6ms 45.4MB 7597ms 150ms openjdk/zgc 21
java 2-m.java 2519ms 21ms 94.5MB 9413ms 47ms 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 3ms ruby/yjit 3.4.2
ruby 4.rb timeout 0.0ms 454.8MB 5133ms 270ms truffleruby 24.2.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 603ms 2.9ms 47.6MB 2127ms 23ms openjdk 21
java 2-m.java 618ms 4.6ms 49.0MB 2187ms 27ms openjdk 23
java 2-m.java 737ms 4.9ms 45.5MB 2160ms 147ms openjdk/zgc 21
java 2-m.java 775ms 11ms 95.1MB 2713ms 43ms graal/jvm 17.0.8
ruby 4.rb 4888ms 24ms 442.4MB 5167ms 227ms truffleruby 24.2.0
ruby 4.rb timeout 0.0ms 13.0MB 4983ms 3ms ruby 3.4.2
ruby 4.rb timeout 0.0ms 13.5MB 4980ms 0ms 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 255ms 0.5ms 47.6MB 760ms 23ms openjdk 21
java 2-m.java 259ms 11ms 48.6MB 767ms 20ms openjdk 23
java 2-m.java 305ms 26ms 96.4MB 910ms 50ms graal/jvm 17.0.8
java 2-m.java 384ms 3.8ms 45.7MB 763ms 150ms openjdk/zgc 21
ruby 4.rb 1433ms 18ms 370.1MB 1793ms 130ms truffleruby 24.2.0
ruby 4.rb timeout 0.0ms 13.0MB 4980ms 7ms ruby 3.4.2
ruby 4.rb timeout 0.0ms 13.8MB 4980ms 7ms ruby/yjit 3.4.2