Programming Language and compiler
Benchmarks

Results for 38 of 40 languages from this run on actest1.

Unavailable in this run: Hack, Lisp. Follow the run link for failure details.

Ruby VS Java benchmarks

Current benchmark data was generated on Sun Sep 27 2026, full log can be found HERE

CONTRIBUTIONS are WELCOME!

[x86_64][4 cores] Intel(R) Core(TM) i7-3687U CPU @ 2.10GHz (Model 58)

* -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 782ms 124ms 569.1MB 957ms 133ms openjdk 21.0.12
java 2.java 1276ms 44ms 1086.4MB 900ms 603ms openjdk/zgc 21.0.12
ruby 1.rb 11360ms 112ms 87.8MB 11283ms 57ms ruby 3.2.3
ruby 1.rb 11813ms 6.3ms 87.9MB 11740ms 57ms ruby/yjit 3.2.3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2.java 192ms 18ms 167.6MB 260ms 27ms openjdk 21.0.12
java 2.java 378ms 84ms 239.8MB 267ms 200ms openjdk/zgc 21.0.12
ruby 1.rb 1118ms 12ms 30.2MB 1087ms 17ms ruby 3.2.3
ruby 1.rb 1172ms 15ms 30.3MB 1137ms 20ms ruby/yjit 3.2.3

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 2953ms 188ms 213.9MB 11130ms 147ms openjdk 21.0.12
java 1-m.java 3742ms 52ms 618.0MB 13450ms 670ms openjdk/zgc 21.0.12
ruby 1.rb 7971ms 44ms 73.0MB 7883ms 63ms ruby/yjit 3.2.3
ruby 1.rb 8086ms 166ms 73.1MB 7980ms 83ms ruby 3.2.3

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 359ms 10ms 34.9MB 317ms 27ms ruby/yjit 3.2.3
ruby 1.rb 362ms 11ms 34.9MB 317ms 30ms ruby 3.2.3
java 1-m.java 545ms 57ms 74.1MB 1767ms 40ms openjdk 21.0.12
java 1-m.java 671ms 12ms 150.9MB 1950ms 203ms openjdk/zgc 21.0.12

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4.java 471ms 5.9ms 48.4MB 617ms 17ms openjdk 21.0.12
java 4.java 569ms 9.0ms 44.2MB 627ms 110ms openjdk/zgc 21.0.12
ruby 6.rb 5551ms 66ms 33.6MB 5523ms 13ms ruby 3.2.3
ruby 6.rb 5694ms 44ms 33.6MB 5653ms 23ms ruby/yjit 3.2.3

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 4-m.java 171ms 12ms 47.1MB 250ms 23ms openjdk 21.0.12
java 4.java 237ms 6.5ms 41.9MB 237ms 93ms openjdk/zgc 21.0.12
ruby 6.rb 621ms 1.8ms 25.0MB 597ms 7ms ruby 3.2.3
ruby 6.rb 651ms 3.1ms 24.9MB 620ms 17ms ruby/yjit 3.2.3

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 85ms 4.7ms 22.6MB 64ms 12ms ruby/yjit 3.2.3
java 1.java 93ms 5.3ms 44.3MB 116ms 12ms openjdk 21.0.12
ruby 1.rb 95ms 7.0ms 22.5MB 62ms 18ms ruby 3.2.3
java 1.java 165ms 3.2ms 42.8MB 128ms 88ms openjdk/zgc 21.0.12

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 490ms 4.8ms 44.0MB 457ms 23ms ruby 3.2.3
ruby 1.rb 502ms 10ms 44.5MB 470ms 20ms ruby/yjit 3.2.3

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 4199ms 14ms 165.3MB 4103ms 80ms ruby 3.2.3
ruby 1.rb 4309ms 50ms 165.6MB 4203ms 87ms ruby/yjit 3.2.3

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 861ms 5.6ms 22.8MB 833ms 17ms ruby 3.2.3
ruby 1.rb 879ms 15ms 22.7MB 860ms 7ms ruby/yjit 3.2.3

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 2450ms 53ms 22.8MB 2420ms 13ms ruby/yjit 3.2.3
ruby 1.rb 2468ms 49ms 22.8MB 2437ms 13ms ruby 3.2.3

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 474ms 9.8ms 22.8MB 447ms 13ms ruby/yjit 3.2.3
ruby 1.rb 482ms 2.1ms 22.8MB 457ms 10ms ruby 3.2.3

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 639ms 19ms 672.5MB 787ms 113ms openjdk 21.0.12
java 1.java 1091ms 23ms 952.0MB 723ms 573ms openjdk/zgc 21.0.12
ruby 1.rb 27746ms 105ms 103.9MB 27650ms 80ms ruby 3.2.3
ruby 1.rb 27918ms 153ms 104.0MB 27813ms 87ms ruby/yjit 3.2.3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 244ms 6.2ms 203.4MB 380ms 43ms openjdk 21.0.12
java 1.java 494ms 111ms 341.8MB 367ms 237ms openjdk/zgc 21.0.12
ruby 1.rb 6147ms 56ms 44.0MB 6087ms 47ms ruby/yjit 3.2.3
ruby 1.rb 6156ms 36ms 44.0MB 6097ms 43ms ruby 3.2.3

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 836ms 7.8ms 45.3MB 903ms 20ms openjdk 21.0.12
java 1.java 948ms 8.1ms 42.6MB 943ms 97ms openjdk/zgc 21.0.12
java 2.java 2391ms 105ms 668.4MB 2600ms 133ms openjdk 21.0.12
java 2.java 4242ms 39ms 2140.1MB 3463ms 1093ms openjdk/zgc 21.0.12
ruby 2.rb 46837ms 1570ms 22.6MB 46803ms 13ms ruby 3.2.3
ruby 2.rb 47090ms 429ms 22.5MB 47053ms 13ms ruby/yjit 3.2.3

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 192ms 4.7ms 45.4MB 267ms 23ms openjdk 21.0.12
java 1.java 284ms 11ms 45.1MB 267ms 110ms openjdk/zgc 21.0.12
java 2-m.java 470ms 6.5ms 319.0MB 713ms 53ms openjdk 21.0.12
java 2.java 889ms 1.9ms 558.5MB 850ms 327ms openjdk/zgc 21.0.12
ruby 2.rb 4685ms 47ms 22.6MB 4660ms 7ms ruby/yjit 3.2.3
ruby 2.rb 4697ms 102ms 22.5MB 4673ms 10ms ruby 3.2.3

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 1105ms 7.1ms 117.6MB 1193ms 27ms openjdk 21.0.12
java 1.java 1321ms 17ms 111.7MB 1293ms 140ms openjdk/zgc 21.0.12
java 2.java 1354ms 46ms 57.9MB 1457ms 20ms openjdk 21.0.12
java 2.java 1474ms 28ms 53.3MB 1470ms 117ms openjdk/zgc 21.0.12
ruby 1.rb 25887ms 459ms 493.1MB 25683ms 183ms ruby 3.2.3
ruby 1.rb 25973ms 509ms 493.0MB 25737ms 220ms ruby/yjit 3.2.3

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 315ms 5.1ms 65.5MB 413ms 17ms openjdk 21.0.12
java 2.java 395ms 1.2ms 48.3MB 503ms 10ms openjdk 21.0.12
java 1.java 431ms 36ms 60.2MB 433ms 113ms openjdk/zgc 21.0.12
java 2.java 475ms 3.8ms 47.7MB 473ms 113ms openjdk/zgc 21.0.12
ruby 1.rb 6454ms 102ms 141.4MB 6377ms 63ms ruby 3.2.3
ruby 1.rb 6477ms 132ms 141.4MB 6400ms 63ms ruby/yjit 3.2.3

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1.java 5357ms 89ms 417.2MB 6753ms 143ms openjdk 21.0.12
java 1.java 6538ms 393ms 2905.5MB 6313ms 1513ms openjdk/zgc 21.0.12
ruby 1.rb 11411ms 21ms 122.0MB 11350ms 40ms ruby 3.2.3
ruby 1.rb 11438ms 47ms 123.6MB 11370ms 57ms ruby/yjit 3.2.3

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 1-m.java 1639ms 92ms 421.6MB 2920ms 107ms openjdk 21.0.12
java 1-m.java 2264ms 50ms 1392.4MB 2540ms 883ms openjdk/zgc 21.0.12
ruby 1.rb 2813ms 16ms 124.1MB 2747ms 47ms ruby 3.2.3
ruby 1.rb 2836ms 11ms 123.9MB 2773ms 43ms ruby/yjit 3.2.3

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 6269ms 79ms 47.7MB 24327ms 20ms openjdk 21.0.12
java 2-m.java 6422ms 61ms 45.2MB 24347ms 163ms openjdk/zgc 21.0.12
ruby 4.rb timeout (300s) — — — — ruby 3.2.3
ruby 4.rb timeout (300s) — — — — ruby/yjit 3.2.3

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 1680ms 11ms 46.0MB 6267ms 40ms openjdk 21.0.12
java 2-m.java 1805ms 63ms 44.1MB 6343ms 120ms openjdk/zgc 21.0.12
ruby 4.rb 108151ms 898ms 24.1MB 108120ms 10ms ruby 3.2.3
ruby 4.rb timeout (120s) — — — — ruby/yjit 3.2.3

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
java 2-m.java 551ms 4.8ms 48.2MB 1853ms 20ms openjdk 21.0.12
java 2-m.java 646ms 7.1ms 45.7MB 1900ms 103ms openjdk/zgc 21.0.12
ruby 4.rb 27651ms 1140ms 23.4MB 27623ms 10ms ruby/yjit 3.2.3
ruby 4.rb 28446ms 2206ms 23.3MB 28410ms 13ms ruby 3.2.3