Programming Language and compiler
Benchmarks

D VS Ruby benchmarks

Current benchmark data was generated on Sun Jul 13 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
d 1.d 2199ms 4.7ms 312.4MB 2163ms 43ms ldc2 1.41.0
d 1.d 3022ms 5.5ms 314.5MB 3190ms 57ms dmd 2.111.0
ruby 1.rb 4770ms 133ms 110.1MB 4677ms 77ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 70.5MB 4950ms 33ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 796.7MB 6620ms 720ms truffleruby 24.2.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 205ms 3.7ms 207.6MB 177ms 17ms ldc2 1.41.0
d 1.d 262ms 2.2ms 211.2MB 230ms 17ms dmd 2.111.0
ruby 1.rb 498ms 0.9ms 20.3MB 473ms 10ms ruby/yjit 3.4.4
ruby 1-m.rb 503ms 8.2ms 407.1MB 980ms 150ms truffleruby 24.2.1
ruby 1.rb 947ms 3.2ms 19.5MB 923ms 13ms 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 1449ms 20ms 63.8MB 1373ms 57ms ruby/yjit 3.4.4
ruby 1.rb 1913ms 42ms 63.0MB 1837ms 60ms ruby 3.4.4
d 1.d timeout 0.0ms 16.5MB 4960ms 30ms dmd 2.111.0
d 1.d timeout 0.0ms 15.3MB 4970ms 20ms ldc2 1.41.0
ruby 1.rb timeout 0.0ms 364.7MB 4603ms 1530ms truffleruby 24.2.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
ruby 1.rb 150ms 1.5ms 25.6MB 120ms 20ms ruby/yjit 3.4.4
ruby 1.rb 185ms 1.9ms 25.0MB 157ms 13ms ruby 3.4.4
d 1.d 1063ms 16ms 10.2MB 1037ms 13ms ldc2 1.41.0
d 1.d 1368ms 10ms 12.1MB 1350ms 10ms dmd 2.111.0
ruby 1.rb timeout 0.0ms 346.5MB 4577ms 1460ms truffleruby 24.2.1

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 2551ms 4.2ms 8.1MB 2540ms 0ms ldc2 1.41.0
d 1.d 2867ms 4.2ms 10.3MB 2857ms 0ms dmd 2.111.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 441ms 0.9ms 8.1MB 430ms 0ms ldc2 1.41.0
d 1.d 521ms 1.5ms 10.4MB 510ms 0ms dmd 2.111.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 377ms 1.9ms 3.0MB 1423ms 0ms ldc2 1.41.0
d 2-im.d 1130ms 21ms 3.0MB 4303ms 3ms ldc2 1.41.0
d 1-i.d 1488ms 1.6ms 2.9MB 1480ms 0ms ldc2 1.41.0
d 1.d 3115ms 16ms 2.9MB 3107ms 0ms ldc2 1.41.0
d 2-i.d 3226ms 2.2ms 2.9MB 3217ms 0ms ldc2 1.41.0
d 1.d 3535ms 4.3ms 4.6MB 3527ms 0ms dmd 2.111.0
d 1-im.d 4491ms 66ms 4.8MB 17510ms 0ms dmd 2.111.0
d 1-i.d timeout 0.0ms 4.6MB 4990ms 0ms dmd 2.111.0
d 2-i.d timeout 0.0ms 4.5MB 4990ms 0ms dmd 2.111.0
d 2-im.d timeout 0.0ms 4.9MB 19723ms 0ms dmd 2.111.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-im.d 37ms 1.0ms 3.0MB 110ms 0ms ldc2 1.41.0
d 2-im.d 96ms 1.9ms 3.0MB 350ms 0ms ldc2 1.41.0
d 1-i.d 123ms 0.1ms 2.9MB 120ms 0ms ldc2 1.41.0
d 1.d 264ms 3.2ms 2.9MB 253ms 0ms ldc2 1.41.0
d 2-i.d 266ms 0.6ms 2.8MB 260ms 0ms ldc2 1.41.0
d 1.d 297ms 3.2ms 4.6MB 290ms 0ms dmd 2.111.0
d 1-im.d 377ms 1.2ms 4.9MB 1430ms 0ms dmd 2.111.0
d 2-im.d 527ms 0.8ms 4.9MB 2003ms 0ms dmd 2.111.0
d 1-i.d 882ms 15ms 4.6MB 873ms 0ms dmd 2.111.0
d 2-i.d 1390ms 1.3ms 4.6MB 1380ms 0ms dmd 2.111.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 111ms 2.1ms 2.9MB 100ms 0ms ldc2 1.41.0
d 1.d 640ms 2.7ms 4.6MB 630ms 0ms dmd 2.111.0
ruby 6.rb 2046ms 3.0ms 23.0MB 2023ms 10ms ruby/yjit 3.4.4
ruby 6-m.rb 2107ms 209ms 406.5MB 5403ms 323ms truffleruby 24.2.1
ruby 6.rb 3692ms 15ms 22.4MB 3673ms 10ms ruby 3.4.4

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 14ms 0.5ms 2.9MB 10ms 0ms ldc2 1.41.0
d 1.d 68ms 0.4ms 4.8MB 60ms 0ms dmd 2.111.0
ruby 6.rb 259ms 4.3ms 15.2MB 237ms 10ms ruby/yjit 3.4.4
ruby 6.rb 415ms 1.8ms 14.4MB 397ms 3ms ruby 3.4.4
ruby 6-m.rb 843ms 29ms 380.9MB 2103ms 163ms truffleruby 24.2.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 1.6ms 0.1ms 3.0MB 0ms 0ms ldc2 1.41.0
d 1.d 2.1ms 0.2ms 5.1MB 0ms 0ms dmd 2.111.0
ruby 1.rb 34ms 0.4ms 141.1MB 12ms 24ms truffleruby 24.2.1
ruby 1.rb 51ms 1.1ms 12.8MB 38ms 0ms ruby 3.4.4
ruby 1.rb 53ms 0.4ms 12.9MB 38ms 4ms ruby/yjit 3.4.4

json-serde

Input: sample 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 59ms 0.6ms 15.7MB 63ms 7ms ldc2 1.41.0
d 2.d 239ms 2.1ms 22.7MB 237ms 7ms dmd 2.111.0
ruby 1.rb 247ms 0.5ms 27.1MB 210ms 20ms ruby 3.4.4
ruby 1.rb 250ms 4.8ms 30.1MB 220ms 17ms ruby/yjit 3.4.4
ruby 1-m.rb 4251ms 31ms 506.4MB 11203ms 337ms truffleruby 24.2.1

Input: canada 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 464ms 3.4ms 139.5MB 433ms 27ms ldc2 1.41.0
ruby 1.rb 2101ms 28ms 135.5MB 2013ms 73ms ruby/yjit 3.4.4
ruby 1.rb 2146ms 112ms 132.6MB 2067ms 67ms ruby 3.4.4
d 2.d 2474ms 8.3ms 158.3MB 2493ms 30ms dmd 2.111.0
ruby 1.rb timeout 0.0ms 499.9MB 13243ms 367ms truffleruby 24.2.1

knucleotide

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-m.d 643ms 26ms 48.5MB 2040ms 13ms ldc2 1.41.0
d 1-m.d 1937ms 33ms 50.0MB 5567ms 10ms dmd 2.111.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1-m.d 95ms 8.6ms 39.5MB 253ms 23ms ldc2 1.41.0
d 1-m.d 211ms 7.1ms 39.9MB 597ms 10ms dmd 2.111.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 130ms 0.9ms 6.2MB 120ms 0ms ldc2 1.41.0
d 1.d 175ms 1.9ms 7.9MB 163ms 3ms dmd 2.111.0
ruby 1.rb 342ms 3.2ms 13.5MB 327ms 3ms ruby/yjit 3.4.4
ruby 1.rb 529ms 4.4ms 12.9MB 510ms 0ms ruby 3.4.4
ruby 1-m.rb 686ms 7.4ms 371.8MB 1270ms 140ms truffleruby 24.2.1

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 377ms 2.3ms 5.9MB 367ms 10ms ldc2 1.41.0
d 1.d 510ms 2.0ms 7.9MB 497ms 10ms dmd 2.111.0
ruby 1.rb 910ms 1.6ms 13.5MB 890ms 10ms ruby/yjit 3.4.4
ruby 1-m.rb 1261ms 52ms 406.7MB 1777ms 167ms truffleruby 24.2.1
ruby 1.rb 1485ms 8.7ms 12.9MB 1470ms 3ms ruby 3.4.4

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 58ms 0.4ms 5.9MB 50ms 0ms ldc2 1.41.0
d 1.d 80ms 0.5ms 8.1MB 70ms 0ms dmd 2.111.0
ruby 1.rb 198ms 2.8ms 13.5MB 187ms 0ms ruby/yjit 3.4.4
ruby 1.rb 289ms 1.2ms 12.8MB 273ms 7ms ruby 3.4.4
ruby 1-m.rb 525ms 17ms 354.7MB 1033ms 137ms truffleruby 24.2.1

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 367ms 1.1ms 6.5MB 353ms 0ms ldc2 1.41.0
d 1.d 2143ms 64ms 9.4MB 2130ms 0ms dmd 2.111.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 18ms 0.3ms 3.0MB 10ms 0ms ldc2 1.41.0
d 1.d 92ms 2.4ms 4.6MB 87ms 0ms dmd 2.111.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 1096ms 2.5ms 312.7MB 1057ms 40ms ldc2 1.41.0
d 1.d 1850ms 6.1ms 314.9MB 1977ms 50ms dmd 2.111.0
ruby 1-m.rb 3861ms 33ms 612.1MB 9853ms 350ms truffleruby 24.2.1
ruby 1.rb timeout 0.0ms 93.5MB 4947ms 40ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 97.4MB 4940ms 50ms ruby/yjit 3.4.4

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 230ms 1.2ms 312.7MB 190ms 27ms ldc2 1.41.0
d 1.d 359ms 1.7ms 315.0MB 327ms 27ms dmd 2.111.0
ruby 1-m.rb 2066ms 110ms 488.8MB 5300ms 230ms truffleruby 24.2.1
ruby 1.rb 3236ms 25ms 38.3MB 3197ms 23ms ruby/yjit 3.4.4
ruby 1.rb 4321ms 12ms 37.6MB 4287ms 23ms ruby 3.4.4

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 360ms 0.2ms 2.9MB 350ms 0ms ldc2 1.41.0
d 2.d 361ms 1.9ms 2.9MB 350ms 0ms ldc2 1.41.0
d 1.d 678ms 2.2ms 4.6MB 670ms 0ms dmd 2.111.0
ruby 2.rb 836ms 14ms 325.0MB 1103ms 117ms truffleruby 24.2.1
d 2.d 2033ms 7.7ms 4.8MB 2023ms 0ms dmd 2.111.0
ruby 2.rb timeout 0.0ms 12.8MB 4983ms 3ms ruby 3.4.4
ruby 2.rb timeout 0.0ms 13.5MB 4977ms 10ms ruby/yjit 3.4.4

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 2.d 38ms 0.3ms 2.9MB 30ms 0ms ldc2 1.41.0
d 1.d 39ms 0.4ms 2.9MB 30ms 0ms ldc2 1.41.0
d 1.d 72ms 0.1ms 4.8MB 60ms 0ms dmd 2.111.0
d 2.d 207ms 2.8ms 4.8MB 197ms 0ms dmd 2.111.0
ruby 2-m.rb 309ms 6.6ms 309.6MB 560ms 103ms truffleruby 24.2.1
ruby 2.rb 1028ms 6.1ms 13.5MB 1010ms 3ms ruby/yjit 3.4.4
ruby 2.rb 2980ms 14ms 12.8MB 2963ms 7ms ruby 3.4.4

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 300ms 2.3ms 45.7MB 287ms 0ms ldc2 1.41.0
d 1.d 347ms 3.8ms 79.3MB 333ms 3ms dmd 2.111.0
d 2.d 843ms 2.4ms 49.7MB 830ms 3ms ldc2 1.41.0
d 2.d 1172ms 3.3ms 49.3MB 1157ms 3ms dmd 2.111.0
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 731.6MB 5070ms 153ms truffleruby 24.2.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 64ms 3.3ms 15.7MB 53ms 0ms ldc2 1.41.0
d 1.d 76ms 1.6ms 25.2MB 63ms 0ms dmd 2.111.0
d 2.d 213ms 1.6ms 17.7MB 200ms 0ms ldc2 1.41.0
d 2.d 291ms 1.5ms 19.6MB 280ms 0ms dmd 2.111.0
ruby 1-m.rb 1697ms 10ms 473.8MB 2493ms 170ms truffleruby 24.2.1
ruby 1.rb 3416ms 80ms 131.8MB 3323ms 83ms ruby/yjit 3.4.4
ruby 1.rb 4472ms 16ms 131.0MB 4383ms 73ms ruby 3.4.4

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 2431ms 4.5ms 8.1MB 2407ms 407ms ldc2 1.41.0
d 1.d 4429ms 9.8ms 10.5MB 4377ms 480ms dmd 2.111.0
ruby 1.rb timeout 0.0ms 130.2MB 4863ms 123ms ruby 3.4.4
ruby 1.rb timeout 0.0ms 131.0MB 4833ms 150ms ruby/yjit 3.4.4
ruby 1.rb timeout 0.0ms 450.5MB 13320ms 430ms truffleruby 24.2.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 584ms 4.3ms 8.1MB 563ms 103ms ldc2 1.41.0
d 1.d 1055ms 3.8ms 10.3MB 1050ms 97ms dmd 2.111.0
ruby 1-m.rb 1668ms 200ms 395.7MB 4403ms 210ms truffleruby 24.2.1
ruby 1.rb 1766ms 80ms 130.9MB 1657ms 93ms ruby/yjit 3.4.4
ruby 1.rb 1816ms 25ms 130.3MB 1690ms 113ms ruby 3.4.4

regex-redux

Input: 2500000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 3.d 583ms 1.9ms 174.2MB 767ms 27ms ldc2 1.41.0
d 3.d 1212ms 9.4ms 177.2MB 1397ms 27ms dmd 2.111.0

Input: 250000_in

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 3.d 65ms 0.3ms 27.6MB 77ms 0ms ldc2 1.41.0
d 3.d 126ms 1.3ms 31.7MB 133ms 7ms dmd 2.111.0

secp256k1

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 4782ms 7.8ms 4.0MB 4757ms 360ms ldc2 1.41.0
d 1.d timeout 0.0ms 6.5MB 4963ms 290ms dmd 2.111.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 1196ms 6.4ms 3.9MB 1190ms 77ms ldc2 1.41.0
d 1.d 2035ms 6.3ms 6.8MB 2023ms 110ms dmd 2.111.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 3594ms 2.3ms 4.0MB 3583ms 0ms ldc2 1.41.0
d 1.d 3630ms 25ms 5.9MB 3620ms 0ms dmd 2.111.0
ruby 4.rb timeout 0.0ms 12.9MB 4983ms 7ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.5MB 4980ms 0ms ruby/yjit 3.4.4
ruby 4.rb timeout 0.0ms 436.6MB 5167ms 240ms truffleruby 24.2.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
d 1.d 901ms 0.5ms 3.5MB 890ms 0ms ldc2 1.41.0
d 1.d 920ms 0.8ms 5.3MB 910ms 0ms dmd 2.111.0
ruby 4.rb 4848ms 12ms 433.6MB 5140ms 203ms truffleruby 24.2.1
ruby 4.rb timeout 0.0ms 12.8MB 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
d 1.d 227ms 0.1ms 3.3MB 220ms 0ms ldc2 1.41.0
d 1.d 233ms 1.1ms 4.9MB 220ms 0ms dmd 2.111.0
ruby 4.rb 1458ms 6.2ms 377.4MB 1793ms 157ms truffleruby 24.2.1
ruby 4.rb timeout 0.0ms 12.9MB 4980ms 3ms ruby 3.4.4
ruby 4.rb timeout 0.0ms 13.6MB 4980ms 3ms ruby/yjit 3.4.4