Programming Language and compiler
Benchmarks

Crystal VS Ruby 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
crystal 1.cr 1219ms 8.5ms 64.2MB 1200ms 10ms crystal 1.16.3
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
crystal 1.cr 105ms 2.8ms 10.9MB 97ms 0ms crystal 1.16.3
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
crystal 1.cr 1500ms 42ms 19.9MB 1437ms 53ms crystal 1.16.3
ruby 1.rb 1867ms 34ms 63.0MB 1787ms 63ms ruby 3.4.4
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
crystal 1.cr 81ms 2.1ms 7.1MB 60ms 10ms crystal 1.16.3
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
ruby 1.rb timeout 0.0ms 356.8MB 4790ms 1430ms truffleruby 24.2.1

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 57ms 0.6ms 6.5MB 40ms 0ms crystal 1.16.3

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 22ms 1.4ms 5.3MB 10ms 0ms crystal 1.16.3

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2486ms 18ms 2.9MB 2477ms 0ms crystal 1.16.3

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 205ms 2.3ms 2.9MB 197ms 0ms crystal 1.16.3

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 536ms 2.9ms 3.5MB 450ms 73ms crystal 1.16.3
crystal 1.cr 678ms 2.3ms 14.6MB 570ms 97ms crystal 1.16.3
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
crystal 2.cr 58ms 0.7ms 3.5MB 40ms 10ms crystal 1.16.3
crystal 1.cr 73ms 1.4ms 4.9MB 50ms 7ms crystal 1.16.3
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
crystal 1.cr 1.9ms 0.2ms 2.9MB 0ms 0ms crystal 1.16.3
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

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2991ms 528ms 240.7MB 293ms 427ms crystal 1.16.3

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1293ms 19ms 53.3MB 27ms 77ms crystal 1.16.3

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 35ms 0.6ms 3.0MB 30ms 0ms crystal 1.16.3
crystal 1.cr 65ms 1.6ms 3.0MB 57ms 0ms crystal 1.16.3
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
crystal 0-unsafe.cr 99ms 1.4ms 3.0MB 90ms 0ms crystal 1.16.3
crystal 1.cr 191ms 5.3ms 3.0MB 183ms 0ms crystal 1.16.3
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
crystal 0-unsafe.cr 17ms 0.5ms 3.0MB 10ms 0ms crystal 1.16.3
crystal 1.cr 30ms 0.8ms 3.0MB 20ms 0ms crystal 1.16.3
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

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 314ms 0.9ms 9.3MB 300ms 0ms crystal 1.16.3

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 17ms 0.0ms 5.4MB 10ms 0ms crystal 1.16.3

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 828ms 9.1ms 64.2MB 810ms 10ms crystal 1.16.3
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
crystal 1.cr 172ms 4.4ms 22.3MB 160ms 0ms crystal 1.16.3
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
crystal 2.cr 343ms 2.0ms 3.3MB 333ms 0ms crystal 1.16.3
crystal 1.cr 345ms 2.9ms 3.4MB 337ms 0ms crystal 1.16.3
ruby 2.rb 823ms 8.8ms 310.2MB 1070ms 110ms truffleruby 24.2.1
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
crystal 1.cr 38ms 1.3ms 3.3MB 30ms 0ms crystal 1.16.3
crystal 2.cr 38ms 0.6ms 3.3MB 30ms 0ms crystal 1.16.3
ruby 2-m.rb 323ms 5.2ms 325.5MB 593ms 110ms truffleruby 24.2.1
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
crystal 2.cr 345ms 3.2ms 8.2MB 337ms 0ms crystal 1.16.3
crystal 1.cr 423ms 6.7ms 42.9MB 410ms 0ms crystal 1.16.3
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
crystal 2.cr 87ms 2.3ms 4.5MB 80ms 0ms crystal 1.16.3
crystal 1.cr 91ms 3.5ms 13.2MB 80ms 0ms crystal 1.16.3
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
crystal 1.cr 1947ms 50ms 6.3MB 1917ms 20ms crystal 1.16.3
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
crystal 1.cr 450ms 9.9ms 5.0MB 437ms 0ms crystal 1.16.3
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

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 3757ms 8.8ms 4.6MB 3743ms 0ms crystal 1.16.3
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
crystal 1.cr 942ms 1.3ms 4.4MB 930ms 0ms crystal 1.16.3
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
crystal 1.cr 240ms 1.7ms 3.9MB 230ms 0ms crystal 1.16.3
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