Programming Language and compiler
Benchmarks

Crystal VS Dart benchmarks

Current benchmark data was generated on Sat Mar 29 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
dart 1.dart 710ms 1.2ms 80.8MB 680ms 37ms dart/exe 3.7.2
crystal 1.cr 1256ms 14ms 64.0MB 1233ms 7ms crystal 1.15.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 1.dart 76ms 0.7ms 42.8MB 50ms 13ms dart/exe 3.7.2
crystal 1.cr 104ms 3.0ms 10.9MB 90ms 0ms crystal 1.15.1

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1216ms 13ms 19.6MB 1143ms 53ms crystal 1.15.1
dart 1.dart timeout 0.0ms 19.3MB 5467ms 70ms dart/exe 3.7.2

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 71ms 1.5ms 7.0MB 43ms 10ms crystal 1.15.1
dart 1.dart 359ms 1.9ms 10.6MB 363ms 13ms dart/exe 3.7.2

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 58ms 0.5ms 6.4MB 43ms 0ms crystal 1.15.1
dart 1.dart 3705ms 14ms 18.0MB 3673ms 23ms dart/exe 3.7.2

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 22ms 1.6ms 5.0MB 10ms 0ms crystal 1.15.1
dart 1.dart 600ms 4.6ms 10.4MB 577ms 17ms dart/exe 3.7.2

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2498ms 7.0ms 2.8MB 2487ms 0ms crystal 1.15.1
dart 2.dart 2710ms 7.5ms 6.1MB 2700ms 0ms dart/exe 3.7.2

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 207ms 2.8ms 2.9MB 200ms 0ms crystal 1.15.1
dart 2.dart 222ms 2.7ms 6.3MB 210ms 0ms dart/exe 3.7.2

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 1.dart 360ms 3.1ms 8.8MB 350ms 0ms dart/exe 3.7.2
crystal 2.cr 557ms 5.8ms 3.4MB 460ms 77ms crystal 1.15.1
crystal 1.cr 698ms 1.4ms 14.4MB 580ms 107ms crystal 1.15.1

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 1.dart 43ms 1.2ms 9.1MB 30ms 0ms dart/exe 3.7.2
crystal 2.cr 59ms 0.6ms 3.5MB 43ms 0ms crystal 1.15.1
crystal 1.cr 75ms 1.4ms 4.8MB 53ms 10ms crystal 1.15.1

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2.0ms 0.2ms 2.9MB 0ms 0ms crystal 1.15.1
dart 1.dart 3.7ms 0.3ms 5.5MB 0ms 0ms dart/exe 3.7.2

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 2-m.dart 1437ms 37ms 100.1MB 1320ms 1593ms dart/exe 3.7.2
crystal 1.cr 2484ms 156ms 256.0MB 320ms 500ms crystal 1.15.1
dart 1.dart 4615ms 74ms 100.0MB 1600ms 1870ms dart/exe 3.7.2

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 2-m.dart 265ms 9.2ms 50.1MB 183ms 297ms dart/exe 3.7.2
crystal 1.cr 1251ms 108ms 59.4MB 30ms 80ms crystal 1.15.1
dart 1.dart 2369ms 11ms 50.6MB 193ms 290ms dart/exe 3.7.2

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 37ms 0.6ms 2.9MB 30ms 0ms crystal 1.15.1
crystal 1.cr 66ms 1.0ms 2.9MB 60ms 0ms crystal 1.15.1
dart 2.dart 167ms 2.8ms 9.3MB 157ms 0ms dart/exe 3.7.2
dart 1.dart 495ms 4.8ms 9.3MB 480ms 0ms dart/exe 3.7.2

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 100ms 2.3ms 2.9MB 90ms 0ms crystal 1.15.1
crystal 1.cr 186ms 3.7ms 2.9MB 173ms 0ms crystal 1.15.1
dart 2.dart 483ms 12ms 9.4MB 470ms 0ms dart/exe 3.7.2
dart 1.dart 1467ms 4.5ms 9.3MB 1447ms 10ms dart/exe 3.7.2

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 18ms 0.8ms 2.9MB 10ms 0ms crystal 1.15.1
crystal 1.cr 32ms 1.0ms 2.9MB 20ms 0ms crystal 1.15.1
dart 2.dart 77ms 1.9ms 9.1MB 63ms 0ms dart/exe 3.7.2
dart 1.dart 115ms 2.3ms 9.3MB 100ms 0ms dart/exe 3.7.2

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 313ms 0.1ms 9.0MB 300ms 0ms crystal 1.15.1

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 18ms 0.5ms 6.3MB 10ms 0ms crystal 1.15.1

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 1.dart 324ms 5.6ms 64.4MB 303ms 20ms dart/exe 3.7.2
crystal 1.cr 847ms 17ms 64.0MB 823ms 10ms crystal 1.15.1

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 1.dart 88ms 1.3ms 43.9MB 57ms 23ms dart/exe 3.7.2
crystal 1.cr 156ms 3.3ms 22.2MB 140ms 0ms crystal 1.15.1

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 343ms 2.0ms 3.1MB 333ms 0ms crystal 1.15.1
crystal 1.cr 345ms 1.8ms 3.1MB 337ms 0ms crystal 1.15.1
dart 3.dart 410ms 5.1ms 6.3MB 397ms 0ms dart/exe 3.7.2

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 38ms 1.2ms 3.1MB 30ms 0ms crystal 1.15.1
crystal 2.cr 39ms 0.8ms 3.1MB 30ms 0ms crystal 1.15.1
dart 3.dart 46ms 0.8ms 6.1MB 40ms 0ms dart/exe 3.7.2

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 300ms 2.7ms 8.1MB 290ms 0ms crystal 1.15.1
crystal 1.cr 424ms 4.1ms 42.3MB 413ms 0ms crystal 1.15.1

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 77ms 0.8ms 4.4MB 70ms 0ms crystal 1.15.1
crystal 1.cr 94ms 1.2ms 13.0MB 80ms 0ms crystal 1.15.1

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 2.dart 1368ms 13ms 15.0MB 1333ms 40ms dart/exe 3.7.2
crystal 1.cr 1888ms 51ms 6.2MB 1860ms 13ms crystal 1.15.1

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 2.dart 339ms 5.2ms 14.8MB 310ms 20ms dart/exe 3.7.2
crystal 1.cr 458ms 11ms 4.9MB 447ms 0ms crystal 1.15.1

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 1.dart 3776ms 6.4ms 6.3MB 3767ms 0ms dart/exe 3.7.2
crystal 1.cr 3796ms 8.8ms 4.4MB 3783ms 0ms crystal 1.15.1
dart 2.dart 4353ms 9.3ms 6.4MB 4343ms 0ms dart/exe 3.7.2

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
dart 1.dart 948ms 5.6ms 6.5MB 937ms 0ms dart/exe 3.7.2
crystal 1.cr 955ms 4.2ms 4.3MB 943ms 0ms crystal 1.15.1
dart 2.dart 1099ms 5.7ms 6.4MB 1087ms 0ms dart/exe 3.7.2

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 243ms 3.1ms 3.8MB 233ms 0ms crystal 1.15.1
dart 1.dart 244ms 1.1ms 6.4MB 230ms 0ms dart/exe 3.7.2
dart 2.dart 279ms 2.6ms 6.3MB 270ms 0ms dart/exe 3.7.2