Programming Language and compiler
Benchmarks

Ruby VS C# 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
csharp 1.cs 901ms 14ms 197.1MB 893ms 147ms dotnet 9.0.300
csharp 1.cs 1061ms 140ms 164.4MB 963ms 127ms dotnet/aot 9.0.300
csharp 1.cs 1725ms 105ms 103.6MB 1900ms 227ms mono 6.12.0
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
csharp 1.cs 141ms 1.3ms 46.1MB 120ms 10ms mono 6.12.0
csharp 1.cs 175ms 44ms 31.8MB 100ms 33ms dotnet/aot 9.0.300
csharp 1.cs 191ms 4.8ms 49.7MB 147ms 37ms dotnet 9.0.300
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
ruby 1.rb 1867ms 34ms 63.0MB 1787ms 63ms ruby 3.4.4
csharp 1-m.cs 2161ms 100ms 50.8MB 7650ms 67ms dotnet/aot 9.0.300
csharp 1-m.cs 2851ms 149ms 74.2MB 9103ms 90ms dotnet 9.0.300
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
ruby 1.rb 152ms 1.3ms 25.6MB 123ms 13ms ruby/yjit 3.4.4
csharp 1-m.cs 157ms 18ms 18.6MB 467ms 10ms dotnet/aot 9.0.300
ruby 1.rb 182ms 1.0ms 25.0MB 150ms 13ms ruby 3.4.4
csharp 1-m.cs 277ms 19ms 36.9MB 790ms 20ms dotnet 9.0.300
ruby 1.rb timeout 0.0ms 356.8MB 4790ms 1430ms truffleruby 24.2.1

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 5-m.cs 124ms 7.2ms 23.0MB 350ms 80ms dotnet/aot 9.0.300
csharp 5-m.cs 190ms 9.8ms 39.9MB 463ms 120ms dotnet 9.0.300
csharp 5-m.cs 234ms 8.5ms 37.7MB 657ms 93ms mono 6.12.0
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
csharp 5-m.cs 25ms 0.5ms 16.0MB 30ms 10ms dotnet/aot 9.0.300
csharp 5-m.cs 63ms 2.5ms 37.0MB 83ms 17ms dotnet 9.0.300
csharp 5-m.cs 72ms 3.0ms 29.5MB 103ms 20ms mono 6.12.0
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
csharp 1.cs 7.8ms 2.1ms 9.5MB 0ms 0ms dotnet/aot 9.0.300
csharp 1.cs 30ms 0.5ms 21.7MB 18ms 2ms mono 6.12.0
csharp 1.cs 34ms 1.1ms 26.1MB 20ms 2ms dotnet 9.0.300
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

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 247ms 0.5ms 27.5MB 220ms 10ms ruby 3.4.4
ruby 1.rb 249ms 5.5ms 27.8MB 220ms 13ms ruby/yjit 3.4.4
csharp 2.cs 306ms 0.8ms 68.7MB 270ms 30ms dotnet 9.0.300
csharp 1.cs 720ms 5.2ms 143.7MB 743ms 83ms dotnet 9.0.300
ruby 1-m.rb 4414ms 177ms 502.4MB 11650ms 337ms truffleruby 24.2.1

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 1470ms 26ms 232.5MB 1603ms 87ms dotnet 9.0.300
ruby 1.rb 2068ms 11ms 135.0MB 1977ms 77ms ruby/yjit 3.4.4
ruby 1.rb 2084ms 23ms 133.9MB 2000ms 73ms ruby 3.4.4
csharp 1.cs 2689ms 90ms 753.0MB 3190ms 447ms dotnet 9.0.300
ruby 1.rb timeout 0.0ms 515.9MB 13230ms 373ms truffleruby 24.2.1

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 94ms 4.1ms 9.9MB 83ms 0ms dotnet/aot 9.0.300
csharp 2.cs 150ms 2.5ms 23.2MB 133ms 3ms mono 6.12.0
csharp 2.cs 253ms 4.8ms 29.4MB 237ms 10ms dotnet 9.0.300
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
csharp 1.cs 1037ms 9.2ms 13.0MB 1020ms 3ms dotnet/aot 9.0.300
csharp 1.cs 1324ms 54ms 32.8MB 1313ms 13ms dotnet 9.0.300
csharp 1.cs 3334ms 47ms 43.8MB 3287ms 37ms mono 6.12.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 263ms 4.6ms 9.8MB 250ms 0ms dotnet/aot 9.0.300
csharp 2.cs 362ms 2.4ms 23.2MB 350ms 0ms mono 6.12.0
csharp 2.cs 403ms 4.6ms 29.3MB 387ms 10ms dotnet 9.0.300
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
csharp 1.cs 3102ms 23ms 13.4MB 3080ms 7ms dotnet/aot 9.0.300
csharp 1.cs 3566ms 25ms 32.8MB 3547ms 20ms dotnet 9.0.300
csharp 1.cs timeout 0.0ms 49.8MB 4947ms 43ms mono 6.12.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 49ms 0.8ms 9.6MB 40ms 0ms dotnet/aot 9.0.300
csharp 2.cs 92ms 2.6ms 22.8MB 83ms 0ms mono 6.12.0
csharp 2.cs 166ms 5.8ms 29.4MB 140ms 10ms dotnet 9.0.300
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
csharp 1.cs 1611ms 4.6ms 32.6MB 1603ms 10ms dotnet 9.0.300
csharp 1.cs 1815ms 5.9ms 12.9MB 1797ms 0ms dotnet/aot 9.0.300
csharp 1.cs 1829ms 5.2ms 28.9MB 1813ms 0ms mono 6.12.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
csharp 2.cs 525ms 14ms 120.6MB 483ms 83ms dotnet/aot 9.0.300
csharp 1.cs 577ms 8.1ms 144.9MB 530ms 113ms dotnet/aot 9.0.300
csharp 2.cs 666ms 14ms 136.1MB 620ms 100ms dotnet 9.0.300
csharp 1.cs 749ms 4.3ms 166.8MB 690ms 137ms dotnet 9.0.300
csharp 1.cs 1280ms 4.1ms 144.6MB 1447ms 180ms mono 6.12.0
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
csharp 2.cs 127ms 4.7ms 57.1MB 100ms 30ms dotnet/aot 9.0.300
csharp 1.cs 154ms 5.1ms 74.8MB 123ms 50ms dotnet/aot 9.0.300
csharp 2.cs 262ms 8.0ms 75.8MB 220ms 43ms dotnet 9.0.300
csharp 1.cs 264ms 2.4ms 69.4MB 240ms 33ms mono 6.12.0
csharp 1.cs 276ms 3.6ms 93.0MB 247ms 53ms dotnet 9.0.300
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
csharp 9.cs 360ms 3.8ms 27.9MB 340ms 10ms dotnet 9.0.300
csharp 8.cs 370ms 3.3ms 9.9MB 360ms 0ms dotnet/aot 9.0.300
csharp 8.cs 419ms 1.1ms 27.6MB 400ms 3ms dotnet 9.0.300
ruby 2.rb 823ms 8.8ms 310.2MB 1070ms 110ms truffleruby 24.2.1
csharp 8.cs 1252ms 4.8ms 22.3MB 1237ms 0ms mono 6.12.0
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
csharp 8.cs 44ms 0.2ms 9.9MB 30ms 0ms dotnet/aot 9.0.300
csharp 9.cs 93ms 3.0ms 27.6MB 73ms 7ms dotnet 9.0.300
csharp 8.cs 95ms 2.3ms 27.6MB 77ms 3ms dotnet 9.0.300
csharp 8.cs 161ms 0.7ms 22.4MB 147ms 0ms mono 6.12.0
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
csharp 1.cs 297ms 3.2ms 78.8MB 273ms 7ms dotnet/aot 9.0.300
csharp 1.cs 345ms 12ms 96.5MB 317ms 17ms dotnet 9.0.300
csharp 2.cs 392ms 2.8ms 17.7MB 380ms 0ms dotnet/aot 9.0.300
csharp 2.cs 399ms 7.5ms 35.3MB 377ms 13ms dotnet 9.0.300
csharp 1.cs 538ms 2.7ms 84.2MB 517ms 10ms mono 6.12.0
csharp 2.cs 1888ms 39ms 27.4MB 1873ms 0ms mono 6.12.0
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
csharp 1.cs 64ms 1.2ms 24.9MB 50ms 0ms dotnet/aot 9.0.300
csharp 2.cs 101ms 1.4ms 11.9MB 90ms 0ms dotnet/aot 9.0.300
csharp 1.cs 108ms 2.1ms 42.5MB 83ms 7ms dotnet 9.0.300
csharp 2.cs 134ms 3.2ms 29.9MB 110ms 7ms dotnet 9.0.300
csharp 1.cs 144ms 1.5ms 38.1MB 127ms 3ms mono 6.12.0
csharp 2.cs 488ms 5.9ms 21.1MB 473ms 0ms mono 6.12.0
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
csharp 1.cs 3220ms 6.8ms 14.1MB 3130ms 87ms dotnet/aot 9.0.300
csharp 1.cs 3568ms 50ms 38.1MB 3597ms 107ms dotnet 9.0.300
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
csharp 1.cs 759ms 6.1ms 13.5MB 727ms 20ms dotnet/aot 9.0.300
csharp 1.cs 985ms 4.4ms 37.8MB 1073ms 37ms dotnet 9.0.300
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
csharp 3-m.cs 1881ms 41ms 10.4MB 7243ms 7ms dotnet/aot 9.0.300
csharp 3-m.cs 1938ms 34ms 29.9MB 7323ms 20ms dotnet 9.0.300
csharp 3-m.cs 4838ms 168ms 25.5MB 18427ms 13ms mono 6.12.0
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
csharp 3-m.cs 475ms 1.3ms 10.5MB 1813ms 0ms dotnet/aot 9.0.300
csharp 3-m.cs 529ms 1.2ms 30.0MB 1873ms 10ms dotnet 9.0.300
csharp 3-m.cs 1200ms 10ms 26.7MB 4517ms 7ms mono 6.12.0
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
csharp 3-m.cs 129ms 0.6ms 10.6MB 447ms 10ms dotnet/aot 9.0.300
csharp 3-m.cs 179ms 3.3ms 28.4MB 497ms 17ms dotnet 9.0.300
csharp 3-m.cs 341ms 6.9ms 25.5MB 1153ms 7ms mono 6.12.0
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