Programming Language and compiler
Benchmarks

Ruby VS Crystal benchmarks

Current benchmark data was generated on Fri Aug 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 1231ms 8.3ms 64.2MB 1203ms 10ms crystal 1.17.0
ruby 1-m.rb 1486ms 2574ms 801.2MB 6400ms 613ms truffleruby 24.2.2
ruby 1.rb 4961ms 19ms 109.4MB 4863ms 83ms ruby/yjit 3.4.5
ruby 1.rb timeout 0.0ms 70.0MB 4943ms 43ms ruby 3.4.5

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 104ms 1.6ms 11.0MB 90ms 0ms crystal 1.17.0
ruby 1.rb 504ms 1.1ms 20.3MB 480ms 10ms ruby/yjit 3.4.5
ruby 1-m.rb 528ms 58ms 407.2MB 1043ms 157ms truffleruby 24.2.2
ruby 1.rb 932ms 5.8ms 19.5MB 913ms 7ms ruby 3.4.5

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 1412ms 3.1ms 63.8MB 1330ms 67ms ruby/yjit 3.4.5
crystal 1.cr 1489ms 15ms 19.9MB 1420ms 57ms crystal 1.17.0
ruby 1.rb 1861ms 27ms 63.1MB 1780ms 63ms ruby 3.4.5
ruby 1.rb timeout 0.0ms 339.5MB 4537ms 1523ms truffleruby 24.2.2

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 82ms 4.6ms 7.1MB 57ms 10ms crystal 1.17.0
ruby 1.rb 150ms 1.5ms 25.6MB 117ms 17ms ruby/yjit 3.4.5
ruby 1.rb 181ms 2.8ms 25.0MB 153ms 17ms ruby 3.4.5
ruby 1.rb timeout 0.0ms 339.9MB 4580ms 1487ms truffleruby 24.2.2

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 540ms 2.0ms 3.6MB 450ms 77ms crystal 1.17.0
crystal 1.cr 681ms 2.0ms 14.6MB 570ms 97ms crystal 1.17.0
ruby 6.rb 2039ms 34ms 23.0MB 2010ms 13ms ruby/yjit 3.4.5
ruby 6-m.rb 2302ms 225ms 379.4MB 5953ms 337ms truffleruby 24.2.2
ruby 6.rb 3744ms 77ms 22.4MB 3723ms 10ms ruby 3.4.5

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 57ms 0.8ms 3.6MB 40ms 0ms crystal 1.17.0
crystal 1.cr 72ms 0.8ms 4.4MB 53ms 7ms crystal 1.17.0
ruby 6.rb 261ms 6.6ms 15.0MB 243ms 0ms ruby/yjit 3.4.5
ruby 6.rb 429ms 2.4ms 14.4MB 410ms 3ms ruby 3.4.5
ruby 6-m.rb 825ms 31ms 410.3MB 2047ms 173ms truffleruby 24.2.2

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1.9ms 0.1ms 2.9MB 0ms 0ms crystal 1.17.0
ruby 1.rb 35ms 0.6ms 141.9MB 12ms 28ms truffleruby 24.2.2
ruby 1.rb 50ms 0.8ms 12.8MB 36ms 4ms ruby 3.4.5
ruby 1.rb 51ms 1.7ms 13.0MB 36ms 4ms ruby/yjit 3.4.5

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 251ms 0.5ms 29.2MB 220ms 13ms ruby 3.4.5
ruby 1.rb 253ms 3.8ms 29.0MB 227ms 10ms ruby/yjit 3.4.5
ruby 1-m.rb 4461ms 188ms 483.7MB 11710ms 347ms truffleruby 24.2.2

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 2102ms 20ms 132.8MB 2010ms 77ms ruby/yjit 3.4.5
ruby 1.rb 2103ms 10ms 133.9MB 2020ms 70ms ruby 3.4.5
ruby 1.rb timeout 0.0ms 502.2MB 13287ms 387ms truffleruby 24.2.2

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 37ms 0.9ms 3.0MB 30ms 0ms crystal 1.17.0
crystal 1.cr 70ms 1.9ms 3.0MB 60ms 0ms crystal 1.17.0
ruby 1.rb 340ms 5.5ms 13.5MB 323ms 3ms ruby/yjit 3.4.5
ruby 1.rb 544ms 2.3ms 12.9MB 530ms 3ms ruby 3.4.5
ruby 1-m.rb 702ms 23ms 374.1MB 1243ms 143ms truffleruby 24.2.2

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 105ms 1.9ms 3.0MB 97ms 0ms crystal 1.17.0
crystal 1.cr 201ms 2.2ms 3.0MB 190ms 0ms crystal 1.17.0
ruby 1.rb 893ms 4.0ms 13.5MB 873ms 10ms ruby/yjit 3.4.5
ruby 1-m.rb 1199ms 32ms 415.0MB 1677ms 160ms truffleruby 24.2.2
ruby 1.rb 1542ms 5.2ms 12.9MB 1523ms 3ms ruby 3.4.5

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 19ms 1.2ms 3.0MB 10ms 0ms crystal 1.17.0
crystal 1.cr 33ms 1.2ms 3.0MB 20ms 0ms crystal 1.17.0
ruby 1.rb 195ms 1.8ms 13.5MB 180ms 3ms ruby/yjit 3.4.5
ruby 1.rb 297ms 2.9ms 12.8MB 280ms 3ms ruby 3.4.5
ruby 1-m.rb 476ms 13ms 357.3MB 890ms 140ms truffleruby 24.2.2

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 838ms 12ms 64.2MB 820ms 7ms crystal 1.17.0
ruby 1-m.rb 3864ms 19ms 565.6MB 9860ms 350ms truffleruby 24.2.2
ruby 1.rb timeout 0.0ms 94.1MB 4937ms 47ms ruby 3.4.5
ruby 1.rb timeout 0.0ms 94.8MB 4940ms 50ms ruby/yjit 3.4.5

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 177ms 4.2ms 22.3MB 160ms 0ms crystal 1.17.0
ruby 1-m.rb 2027ms 88ms 571.0MB 5207ms 273ms truffleruby 24.2.2
ruby 1.rb 3296ms 19ms 38.3MB 3260ms 20ms ruby/yjit 3.4.5
ruby 1.rb 4401ms 19ms 37.8MB 4363ms 20ms ruby 3.4.5

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 345ms 2.9ms 3.4MB 337ms 0ms crystal 1.17.0
crystal 1.cr 346ms 3.1ms 3.4MB 337ms 0ms crystal 1.17.0
ruby 2.rb 817ms 1.5ms 309.6MB 1057ms 110ms truffleruby 24.2.2
ruby 2.rb timeout 0.0ms 12.8MB 4983ms 7ms ruby 3.4.5
ruby 2.rb timeout 0.0ms 13.5MB 4980ms 0ms ruby/yjit 3.4.5

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 37ms 0.5ms 3.4MB 30ms 0ms crystal 1.17.0
crystal 1.cr 39ms 0.1ms 3.4MB 30ms 0ms crystal 1.17.0
ruby 2-m.rb 309ms 13ms 309.8MB 537ms 117ms truffleruby 24.2.2
ruby 2.rb 1044ms 2.3ms 13.5MB 1023ms 7ms ruby/yjit 3.4.5
ruby 2.rb 2832ms 56ms 12.8MB 2813ms 7ms ruby 3.4.5

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 301ms 3.1ms 8.3MB 290ms 0ms crystal 1.17.0
crystal 1.cr 420ms 4.6ms 43.0MB 403ms 0ms crystal 1.17.0
ruby 1.rb timeout 0.0ms 325.3MB 4840ms 140ms ruby 3.4.5
ruby 1.rb timeout 0.0ms 327.0MB 4847ms 140ms ruby/yjit 3.4.5
ruby 1.rb timeout 0.0ms 737.6MB 5057ms 157ms truffleruby 24.2.2

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 74ms 0.2ms 4.5MB 70ms 0ms crystal 1.17.0
crystal 1.cr 89ms 0.6ms 13.2MB 80ms 0ms crystal 1.17.0
ruby 1-m.rb 1694ms 36ms 474.9MB 2407ms 170ms truffleruby 24.2.2
ruby 1.rb 3393ms 45ms 131.6MB 3303ms 70ms ruby/yjit 3.4.5
ruby 1.rb 4458ms 22ms 131.0MB 4367ms 77ms ruby 3.4.5

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1960ms 30ms 6.3MB 1927ms 17ms crystal 1.17.0
ruby 1.rb timeout 0.0ms 130.1MB 4833ms 153ms ruby 3.4.5
ruby 1.rb timeout 0.0ms 130.9MB 4840ms 147ms ruby/yjit 3.4.5
ruby 1.rb timeout 0.0ms 451.7MB 13370ms 400ms truffleruby 24.2.2

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 438ms 11ms 5.0MB 430ms 0ms crystal 1.17.0
ruby 1-m.rb 1509ms 109ms 384.9MB 4013ms 193ms truffleruby 24.2.2
ruby 1.rb 1759ms 8.3ms 130.9MB 1633ms 113ms ruby/yjit 3.4.5
ruby 1.rb 1782ms 5.6ms 130.0MB 1650ms 123ms ruby 3.4.5

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 3758ms 11ms 4.5MB 3750ms 0ms crystal 1.17.0
ruby 4.rb timeout 0.0ms 12.9MB 4987ms 0ms ruby 3.4.5
ruby 4.rb timeout 0.0ms 13.5MB 4980ms 10ms ruby/yjit 3.4.5
ruby 4.rb timeout 0.0ms 420.8MB 5170ms 227ms truffleruby 24.2.2

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 941ms 1.2ms 4.5MB 930ms 0ms crystal 1.17.0
ruby 4.rb 4810ms 20ms 422.1MB 5107ms 190ms truffleruby 24.2.2
ruby 4.rb timeout 0.0ms 12.9MB 4983ms 0ms ruby 3.4.5
ruby 4.rb timeout 0.0ms 13.6MB 4983ms 0ms ruby/yjit 3.4.5

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 242ms 3.7ms 3.9MB 233ms 0ms crystal 1.17.0
ruby 4.rb 1419ms 19ms 379.8MB 1753ms 130ms truffleruby 24.2.2
ruby 4.rb timeout 0.0ms 12.9MB 4987ms 0ms ruby 3.4.5
ruby 4.rb timeout 0.0ms 13.8MB 4983ms 0ms ruby/yjit 3.4.5