Programming Language and compiler
Benchmarks

Crystal VS Nim benchmarks

Current benchmark data was generated on Mon Apr 14 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
nim 2.nim 934ms 16ms 34.6MB 917ms 3ms nim 2.2.2
nim 2.nim 960ms 15ms 34.9MB 947ms 0ms nim/clang 2.2.2
crystal 1.cr 1247ms 8.3ms 64.0MB 1223ms 13ms crystal 1.16.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 88ms 1.6ms 5.5MB 80ms 0ms nim 2.2.2
nim 2.nim 91ms 2.6ms 5.8MB 80ms 0ms nim/clang 2.2.2
crystal 1.cr 107ms 2.4ms 10.9MB 97ms 0ms crystal 1.16.0

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1555ms 17ms 19.8MB 1483ms 60ms crystal 1.16.0
nim 1.nim timeout 0.0ms 559.4MB 2500ms 2040ms nim 2.2.2
nim 1.nim timeout 0.0ms 555.8MB 2460ms 2080ms nim/clang 2.2.2

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 86ms 2.7ms 7.0MB 67ms 10ms crystal 1.16.0
nim 1.nim 4313ms 32ms 519.8MB 2100ms 1790ms nim/clang 2.2.2
nim 1.nim 4341ms 20ms 519.4MB 2177ms 1743ms nim 2.2.2

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 59ms 0.2ms 6.4MB 40ms 3ms crystal 1.16.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 23ms 1.2ms 5.1MB 10ms 0ms crystal 1.16.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2465ms 3.2ms 2.8MB 2457ms 0ms crystal 1.16.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 204ms 1.4ms 2.8MB 190ms 0ms crystal 1.16.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 187ms 1.4ms 1.5MB 180ms 0ms nim 2.2.2
nim 2.nim 236ms 2.8ms 1.8MB 223ms 0ms nim/clang 2.2.2
crystal 2.cr 553ms 1.2ms 3.5MB 453ms 87ms crystal 1.16.0
nim 1.nim 554ms 2.2ms 1.8MB 453ms 90ms nim/clang 2.2.2
nim 1.nim 575ms 2.2ms 1.5MB 473ms 90ms nim 2.2.2
crystal 1.cr 691ms 0.8ms 14.4MB 573ms 107ms crystal 1.16.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 21ms 0.6ms 1.5MB 10ms 0ms nim 2.2.2
nim 2.nim 26ms 0.3ms 1.8MB 20ms 0ms nim/clang 2.2.2
nim 1.nim 58ms 0.8ms 1.8MB 40ms 0ms nim/clang 2.2.2
crystal 2.cr 61ms 0.9ms 3.5MB 40ms 10ms crystal 1.16.0
nim 1.nim 61ms 0.3ms 1.5MB 40ms 10ms nim 2.2.2
crystal 1.cr 74ms 1.6ms 4.8MB 50ms 10ms crystal 1.16.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 1.1ms 0.1ms 1.5MB 0ms 0ms nim 2.2.2
nim 1.nim 1.1ms 0.1ms 1.9MB 0ms 0ms nim/clang 2.2.2
crystal 1.cr 1.9ms 0.1ms 2.8MB 0ms 0ms crystal 1.16.0

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2319ms 124ms 255.6MB 313ms 490ms crystal 1.16.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1250ms 107ms 59.0MB 37ms 80ms crystal 1.16.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 37ms 1.4ms 2.9MB 30ms 0ms crystal 1.16.0
crystal 1.cr 64ms 0.9ms 2.9MB 53ms 0ms crystal 1.16.0
nim 2.nim 110ms 0.4ms 1.4MB 100ms 0ms nim 2.2.2
nim 2.nim 114ms 0.7ms 1.9MB 110ms 0ms nim/clang 2.2.2
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.2
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.2

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 99ms 1.1ms 2.9MB 90ms 0ms crystal 1.16.0
crystal 1.cr 185ms 0.7ms 2.9MB 173ms 0ms crystal 1.16.0
nim 2.nim 326ms 2.2ms 1.4MB 320ms 0ms nim 2.2.2
nim 2.nim 340ms 0.3ms 1.6MB 330ms 0ms nim/clang 2.2.2
nim 1.nim timeout 0.0ms 1.3MB 4990ms 0ms nim 2.2.2
nim 1.nim timeout 0.0ms 1.5MB 4990ms 0ms nim/clang 2.2.2

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 18ms 1.3ms 2.9MB 10ms 0ms crystal 1.16.0
crystal 1.cr 30ms 1.7ms 2.9MB 20ms 0ms crystal 1.16.0
nim 2.nim 49ms 0.2ms 1.5MB 40ms 0ms nim/clang 2.2.2
nim 2.nim 52ms 1.4ms 1.3MB 43ms 0ms nim 2.2.2
nim 1.nim 446ms 2.7ms 1.5MB 440ms 0ms nim/clang 2.2.2
nim 1.nim 479ms 2.2ms 1.3MB 470ms 0ms nim 2.2.2

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 313ms 1.1ms 9.1MB 300ms 0ms crystal 1.16.0
nim 1.nim 386ms 0.2ms 4.7MB 380ms 0ms nim/clang 2.2.2
nim 1.nim 576ms 0.7ms 4.4MB 570ms 0ms nim 2.2.2

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 17ms 0.4ms 6.3MB 10ms 0ms crystal 1.16.0
nim 1.nim 18ms 0.2ms 1.9MB 10ms 0ms nim/clang 2.2.2
nim 1.nim 26ms 0.9ms 1.6MB 20ms 0ms nim 2.2.2

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 532ms 4.4ms 34.6MB 513ms 0ms nim 2.2.2
nim 1.nim 609ms 7.4ms 34.9MB 593ms 0ms nim/clang 2.2.2
crystal 1.cr 843ms 7.3ms 64.0MB 823ms 10ms crystal 1.16.0

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 113ms 0.7ms 9.6MB 100ms 0ms nim 2.2.2
nim 1.nim 134ms 2.0ms 9.9MB 123ms 0ms nim/clang 2.2.2
crystal 1.cr 174ms 5.4ms 22.1MB 157ms 0ms crystal 1.16.0

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 319ms 0.9ms 1.8MB 310ms 0ms nim 2.2.2
nim 2.nim 342ms 1.8ms 2.0MB 330ms 0ms nim/clang 2.2.2
crystal 1.cr 344ms 0.9ms 3.1MB 333ms 0ms crystal 1.16.0
crystal 2.cr 344ms 2.7ms 3.1MB 333ms 0ms crystal 1.16.0

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 2.nim 34ms 0.6ms 1.8MB 30ms 0ms nim 2.2.2
crystal 2.cr 37ms 0.6ms 3.1MB 30ms 0ms crystal 1.16.0
nim 2.nim 38ms 0.5ms 2.0MB 30ms 0ms nim/clang 2.2.2
crystal 1.cr 39ms 0.7ms 3.3MB 30ms 0ms crystal 1.16.0

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 289ms 6.8ms 41.5MB 277ms 0ms nim 2.2.2
crystal 2.cr 298ms 3.7ms 8.1MB 287ms 0ms crystal 1.16.0
nim 1.nim 329ms 8.1ms 41.8MB 317ms 0ms nim/clang 2.2.2
crystal 1.cr 425ms 7.5ms 62.4MB 410ms 0ms crystal 1.16.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 53ms 2.7ms 11.5MB 40ms 0ms nim 2.2.2
nim 1.nim 56ms 3.9ms 11.8MB 43ms 0ms nim/clang 2.2.2
crystal 2.cr 74ms 1.4ms 4.4MB 67ms 0ms crystal 1.16.0
crystal 1.cr 88ms 0.8ms 13.0MB 80ms 0ms crystal 1.16.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1901ms 45ms 6.2MB 1870ms 17ms crystal 1.16.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 438ms 9.9ms 5.1MB 423ms 0ms crystal 1.16.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 3587ms 0.7ms 1.6MB 3580ms 0ms nim/clang 2.2.2
nim 1.nim 3592ms 2.0ms 1.4MB 3580ms 0ms nim 2.2.2
crystal 1.cr 3762ms 7.2ms 4.5MB 3753ms 0ms crystal 1.16.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 900ms 0.9ms 1.5MB 890ms 0ms nim/clang 2.2.2
nim 1.nim 902ms 2.5ms 1.3MB 890ms 0ms nim 2.2.2
crystal 1.cr 950ms 9.5ms 4.3MB 940ms 0ms crystal 1.16.0

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
nim 1.nim 227ms 0.4ms 1.5MB 220ms 0ms nim/clang 2.2.2
nim 1.nim 227ms 1.0ms 1.3MB 220ms 0ms nim 2.2.2
crystal 1.cr 240ms 2.6ms 3.8MB 233ms 0ms crystal 1.16.0