Programming Language and compiler
Benchmarks

Ruby VS Java benchmarks

Current benchmark data was generated on Tue Jul 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 476ms 14ms 573.9MB 563ms 97ms openjdk 21
java 2.java 481ms 2.8ms 624.6MB 587ms 103ms openjdk 23
java 2-m.java 481ms 16ms 643.1MB 673ms 133ms graal/jvm 17.0.8
java 2.java 1212ms 29ms 1064.1MB 593ms 787ms openjdk/zgc 21
ruby 1-m.rb 4407ms 191ms 804.1MB 6390ms 450ms truffleruby 24.2.1
ruby 1.rb 4955ms 35ms 109.4MB 4853ms 87ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 70.5MB 4940ms 40ms ruby 3.4.4

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 127ms 4.0ms 96.1MB 163ms 30ms openjdk 23
java 2-m.java 127ms 1.6ms 167.1MB 160ms 33ms openjdk 21
java 2-m.java 148ms 3.7ms 215.1MB 223ms 53ms graal/jvm 17.0.8
java 2.java 301ms 3.4ms 241.5MB 157ms 200ms openjdk/zgc 21
ruby 1.rb 505ms 6.5ms 20.3MB 480ms 10ms ruby/yjit 3.4.4
ruby 1-m.rb 570ms 55ms 424.9MB 1133ms 167ms truffleruby 24.2.1
ruby 1.rb 967ms 21ms 19.5MB 943ms 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 1446ms 22ms 63.8MB 1363ms 67ms ruby/yjit 3.4.4
ruby 1.rb 1861ms 20ms 63.0MB 1787ms 63ms ruby 3.4.4
java 1-m.java 2232ms 167ms 260.9MB 8430ms 130ms openjdk 21
java 1-m.java 2386ms 212ms 242.8MB 9050ms 157ms openjdk 23
java 1-m.java 2882ms 346ms 1222.6MB 9280ms 1113ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 327.3MB 4810ms 1417ms truffleruby 24.2.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 155ms 1.3ms 25.6MB 127ms 17ms ruby/yjit 3.4.4
ruby 1.rb 184ms 1.1ms 25.0MB 157ms 17ms ruby 3.4.4
java 1-m.java 471ms 22ms 143.1MB 1587ms 67ms openjdk 21
java 1-m.java 484ms 8.9ms 92.4MB 1607ms 60ms openjdk 23
java 1-m.java 704ms 6.1ms 224.8MB 1930ms 260ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 351.7MB 4637ms 1527ms truffleruby 24.2.1

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4.java 455ms 3.7ms 47.5MB 540ms 20ms openjdk 21
java 4-m.java 458ms 29ms 101.6MB 657ms 43ms graal/jvm 17.0.8
java 4.java 459ms 0.9ms 49.2MB 550ms 17ms openjdk 23
java 4.java 579ms 2.9ms 45.2MB 540ms 147ms openjdk/zgc 21
ruby 6.rb 2079ms 63ms 23.0MB 2053ms 10ms ruby/yjit 3.4.4
ruby 6-m.rb 2218ms 75ms 408.9MB 5653ms 337ms truffleruby 24.2.1
ruby 6.rb 3700ms 18ms 22.4MB 3673ms 10ms ruby 3.4.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4.java 124ms 0.3ms 46.2MB 167ms 10ms openjdk 21
java 4-m.java 130ms 4.9ms 47.9MB 173ms 23ms openjdk 23
java 4-m.java 134ms 8.5ms 90.1MB 183ms 37ms graal/jvm 17.0.8
java 4.java 244ms 8.4ms 44.0MB 170ms 137ms openjdk/zgc 21
ruby 6.rb 257ms 1.5ms 15.2MB 240ms 3ms ruby/yjit 3.4.4
ruby 6.rb 420ms 1.2ms 14.4MB 403ms 7ms ruby 3.4.4
ruby 6-m.rb 848ms 18ms 388.9MB 2133ms 180ms truffleruby 24.2.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 35ms 1.1ms 141.3MB 16ms 24ms truffleruby 24.2.1
ruby 1.rb 52ms 0.9ms 12.8MB 40ms 0ms ruby 3.4.4
ruby 1.rb 52ms 1.2ms 12.9MB 40ms 2ms ruby/yjit 3.4.4
java 1.java 68ms 2.0ms 53.3MB 70ms 20ms graal/jvm 17.0.8
java 1.java 68ms 4.0ms 43.9MB 80ms 14ms openjdk 21
java 1.java 72ms 5.5ms 44.8MB 78ms 16ms openjdk 23
java 1.java 196ms 9.1ms 42.9MB 88ms 144ms 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 259ms 6.8ms 28.8MB 233ms 10ms ruby 3.4.4
ruby 1.rb 260ms 1.6ms 30.1MB 230ms 17ms ruby/yjit 3.4.4
ruby 1-m.rb 4473ms 273ms 553.2MB 11820ms 333ms truffleruby 24.2.1

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 2100ms 16ms 135.4MB 2017ms 73ms ruby 3.4.4
ruby 1.rb 2102ms 15ms 135.2MB 2013ms 73ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 507.3MB 13217ms 343ms 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 342ms 2.8ms 13.5MB 323ms 0ms ruby/yjit 3.4.4
ruby 1.rb 526ms 4.3ms 12.9MB 507ms 3ms ruby 3.4.4
ruby 1-m.rb 707ms 30ms 372.7MB 1240ms 147ms truffleruby 24.2.1

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 913ms 4.6ms 13.5MB 897ms 0ms ruby/yjit 3.4.4
ruby 1-m.rb 1253ms 6.5ms 411.5MB 1750ms 167ms truffleruby 24.2.1
ruby 1.rb 1478ms 32ms 12.9MB 1457ms 7ms ruby 3.4.4

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 198ms 2.3ms 13.5MB 180ms 10ms ruby/yjit 3.4.4
ruby 1.rb 289ms 3.7ms 12.8MB 270ms 7ms ruby 3.4.4
ruby 1-m.rb 530ms 42ms 354.3MB 1040ms 137ms truffleruby 24.2.1

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 406ms 6.2ms 680.0MB 477ms 93ms openjdk 21
java 1.java 408ms 5.0ms 542.5MB 507ms 90ms openjdk 23
java 1-m.java 413ms 4.2ms 629.7MB 610ms 117ms graal/jvm 17.0.8
java 1.java 1046ms 24ms 955.8MB 473ms 713ms openjdk/zgc 21
ruby 1-m.rb 4269ms 456ms 556.4MB 10877ms 377ms truffleruby 24.2.1
ruby 1.rb timeout 0.0ms 93.5MB 4947ms 40ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 97.2MB 4933ms 50ms 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 1.8ms 206.4MB 237ms 40ms openjdk 21
java 1-m.java 170ms 2.7ms 159.0MB 250ms 43ms openjdk 23
java 1-m.java 225ms 12ms 254.0MB 373ms 67ms graal/jvm 17.0.8
java 1.java 419ms 13ms 341.6MB 220ms 280ms openjdk/zgc 21
ruby 1-m.rb 1985ms 41ms 547.4MB 5130ms 257ms truffleruby 24.2.1
ruby 1.rb 3266ms 10ms 38.3MB 3233ms 20ms ruby/yjit 3.4.4
ruby 1.rb 4383ms 23ms 37.6MB 4340ms 27ms ruby 3.4.4

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 443ms 3.6ms 45.4MB 480ms 13ms openjdk 21
java 1.java 446ms 6.4ms 47.9MB 480ms 20ms openjdk 23
java 1.java 455ms 2.3ms 81.4MB 487ms 30ms graal/jvm 17.0.8
java 1.java 580ms 0.9ms 44.8MB 493ms 150ms openjdk/zgc 21
ruby 2.rb 835ms 11ms 315.3MB 1080ms 117ms truffleruby 24.2.1
java 2.java 1243ms 4.5ms 648.2MB 1370ms 90ms openjdk 21
java 2.java 1261ms 7.3ms 751.2MB 1393ms 93ms openjdk 23
java 2.java 3304ms 20ms 2374.4MB 1653ms 1870ms 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 4980ms 7ms ruby/yjit 3.4.4

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 122ms 0.7ms 45.1MB 160ms 20ms openjdk 21
java 1.java 124ms 0.3ms 47.8MB 157ms 23ms openjdk 23
java 1.java 127ms 6.3ms 81.5MB 160ms 30ms graal/jvm 17.0.8
java 1.java 251ms 6.5ms 45.0MB 157ms 150ms openjdk/zgc 21
java 2-m.java 303ms 5.7ms 354.8MB 453ms 53ms openjdk 21
java 2-m.java 317ms 4.5ms 410.3MB 467ms 63ms openjdk 23
ruby 2-m.rb 323ms 13ms 309.9MB 563ms 123ms truffleruby 24.2.1
java 2.java 682ms 14ms 525.1MB 473ms 400ms openjdk/zgc 21
ruby 2.rb 1026ms 2.7ms 13.5MB 1007ms 7ms ruby/yjit 3.4.4
ruby 2.rb 2901ms 120ms 12.8MB 2887ms 0ms ruby 3.4.4

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 410ms 19ms 114.9MB 453ms 23ms openjdk 21
java 1.java 466ms 60ms 118.1MB 510ms 23ms openjdk 23
java 1.java 593ms 9.5ms 112.7MB 503ms 167ms openjdk/zgc 21
java 1-m.java 726ms 65ms 268.1MB 1057ms 93ms graal/jvm 17.0.8
java 2.java 783ms 3.1ms 57.6MB 843ms 20ms openjdk 21
java 2.java 785ms 1.4ms 60.4MB 833ms 20ms openjdk 23
java 2.java 848ms 8.5ms 53.3MB 773ms 150ms openjdk/zgc 21
java 2-m.java 1319ms 123ms 288.2MB 2240ms 110ms graal/jvm 17.0.8
ruby 1.rb timeout 0.0ms 325.3MB 4850ms 137ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 327.0MB 4857ms 130ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 731.6MB 5057ms 170ms truffleruby 24.2.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 151ms 3.7ms 68.5MB 197ms 20ms openjdk 23
java 1.java 159ms 0.5ms 64.7MB 210ms 20ms openjdk 21
java 1-m.java 214ms 11ms 125.0MB 307ms 40ms graal/jvm 17.0.8
java 2.java 264ms 4.5ms 50.1MB 330ms 17ms openjdk 21
java 2.java 264ms 7.6ms 51.2MB 313ms 20ms openjdk 23
java 1.java 286ms 3.1ms 61.6MB 213ms 150ms openjdk/zgc 21
java 2.java 369ms 1.9ms 47.8MB 310ms 140ms openjdk/zgc 21
java 2-m.java 479ms 3.7ms 198.6MB 820ms 83ms graal/jvm 17.0.8
ruby 1-m.rb 1708ms 13ms 494.0MB 2480ms 177ms truffleruby 24.2.1
ruby 1.rb 3451ms 53ms 131.8MB 3363ms 73ms ruby/yjit 3.4.4
ruby 1.rb 4587ms 13ms 131.1MB 4493ms 77ms ruby 3.4.4

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 3266ms 35ms 444.3MB 3720ms 113ms graal/jvm 17.0.8
java 1.java 3753ms 26ms 396.3MB 4607ms 117ms openjdk 23
java 1.java 3808ms 10ms 426.2MB 4643ms 110ms openjdk 21
java 1.java timeout 0.0ms 1782.6MB 4820ms 1117ms openjdk/zgc 21
ruby 1.rb timeout 0.0ms 46.4MB 4923ms 63ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 130.8MB 4903ms 83ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 451.3MB 13403ms 393ms truffleruby 24.2.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 895ms 5.6ms 441.3MB 1260ms 83ms graal/jvm 17.0.8
java 1-m.java 1022ms 25ms 462.8MB 1763ms 103ms openjdk 23
java 1-m.java 1026ms 28ms 420.5MB 1827ms 93ms openjdk 21
ruby 1-m.rb 1666ms 261ms 414.4MB 4383ms 213ms truffleruby 24.2.1
ruby 1.rb 1783ms 63ms 130.9MB 1673ms 97ms ruby/yjit 3.4.4
ruby 1.rb 1814ms 58ms 130.3MB 1703ms 93ms ruby 3.4.4
java 1.java 2017ms 38ms 1333.3MB 1737ms 1047ms 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 1982ms 6.2ms 48.1MB 7593ms 27ms openjdk 21
java 2-m.java 2009ms 7.3ms 48.4MB 7680ms 23ms openjdk 23
java 2-m.java 2122ms 15ms 45.7MB 7580ms 150ms openjdk/zgc 21
java 2-m.java 2530ms 11ms 95.0MB 9480ms 43ms graal/jvm 17.0.8
ruby 4.rb timeout 0.0ms 12.9MB 4980ms 0ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.5MB 4983ms 3ms ruby/yjit 3.4.4
ruby 4.rb timeout 0.0ms 449.5MB 5163ms 247ms truffleruby 24.2.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 606ms 2.2ms 47.4MB 2137ms 20ms openjdk 21
java 2-m.java 616ms 6.8ms 48.8MB 2170ms 27ms openjdk 23
java 2-m.java 737ms 15ms 45.4MB 2170ms 150ms openjdk/zgc 21
java 2-m.java 765ms 14ms 93.1MB 2683ms 40ms graal/jvm 17.0.8
ruby 4.rb 4909ms 38ms 442.4MB 5200ms 217ms truffleruby 24.2.1
ruby 4.rb timeout 0.0ms 12.9MB 4980ms 0ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.5MB 4983ms 3ms 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 254ms 8.5ms 47.8MB 757ms 17ms openjdk 21
java 2-m.java 255ms 3.4ms 48.9MB 757ms 23ms openjdk 23
java 2-m.java 318ms 15ms 93.3MB 973ms 43ms graal/jvm 17.0.8
java 2-m.java 390ms 8.2ms 45.4MB 777ms 147ms openjdk/zgc 21
ruby 4.rb 1458ms 5.9ms 388.7MB 1803ms 150ms truffleruby 24.2.1
ruby 4.rb timeout 0.0ms 12.9MB 4980ms 0ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.6MB 4983ms 0ms ruby/yjit 3.4.4