Programming Language and compiler
Benchmarks

Crystal VS Lua benchmarks

Current benchmark data was generated on Mon Jun 23 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 1282ms 30ms 64.2MB 1257ms 10ms crystal 1.16.3
lua 1.lua 3539ms 82ms 172.9MB 3403ms 123ms luajit 2.1.0-beta3
lua 1.lua timeout 0.0ms 105.0MB 4947ms 37ms lua 5.4.7

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 109ms 0.7ms 11.0MB 97ms 0ms crystal 1.16.3
lua 1.lua 297ms 5.1ms 15.9MB 270ms 7ms luajit 2.1.0-beta3
lua 1.lua 823ms 6.8ms 16.9MB 807ms 0ms lua 5.4.7

coro-prime-sieve

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1505ms 22ms 19.9MB 1440ms 53ms crystal 1.16.3

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 85ms 1.6ms 7.1MB 63ms 10ms crystal 1.16.3

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 58ms 1.4ms 6.4MB 43ms 0ms crystal 1.16.3

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 23ms 1.5ms 5.3MB 10ms 0ms crystal 1.16.3

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2481ms 9.0ms 2.9MB 2470ms 0ms crystal 1.16.3

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 213ms 7.6ms 2.9MB 200ms 0ms crystal 1.16.3

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 535ms 2.1ms 3.5MB 447ms 80ms crystal 1.16.3
crystal 1.cr 681ms 1.3ms 14.6MB 573ms 93ms crystal 1.16.3

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 57ms 0.7ms 3.6MB 40ms 0ms crystal 1.16.3
crystal 1.cr 73ms 0.9ms 4.9MB 57ms 3ms crystal 1.16.3

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
lua 1.lua 1.3ms 0.1ms 2.4MB 0ms 0ms luajit 2.1.0-beta3
lua 1.lua 1.4ms 0.3ms 2.1MB 0ms 0ms lua 5.4.7
crystal 1.cr 1.9ms 0.2ms 2.9MB 0ms 0ms crystal 1.16.3

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2297ms 153ms 300.0MB 313ms 450ms crystal 1.16.3

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1282ms 15ms 53.0MB 33ms 70ms crystal 1.16.3

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 36ms 0.9ms 3.0MB 30ms 0ms crystal 1.16.3
crystal 1.cr 65ms 1.9ms 3.0MB 60ms 0ms crystal 1.16.3

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 101ms 2.3ms 3.0MB 93ms 0ms crystal 1.16.3
crystal 1.cr 186ms 0.8ms 3.0MB 180ms 0ms crystal 1.16.3

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 19ms 1.1ms 3.0MB 10ms 0ms crystal 1.16.3
crystal 1.cr 30ms 0.6ms 3.0MB 20ms 0ms crystal 1.16.3

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 316ms 2.7ms 9.3MB 303ms 0ms crystal 1.16.3

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 17ms 0.6ms 6.1MB 10ms 0ms crystal 1.16.3

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 880ms 16ms 64.2MB 857ms 10ms crystal 1.16.3
lua 1.lua timeout 0.0ms 107.4MB 4953ms 33ms lua 5.4.7
lua 1.lua timeout 0.0ms 149.3MB 4937ms 50ms luajit 2.1.0-beta3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 173ms 3.0ms 22.2MB 157ms 0ms crystal 1.16.3
lua 1.lua 1200ms 56ms 31.1MB 1170ms 17ms luajit 2.1.0-beta3
lua 1.lua 2310ms 37ms 28.6MB 2290ms 7ms lua 5.4.7

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 342ms 1.3ms 3.3MB 330ms 0ms crystal 1.16.3
crystal 1.cr 344ms 2.9ms 3.3MB 333ms 0ms crystal 1.16.3
lua 4.lua 715ms 2.7ms 2.4MB 707ms 0ms luajit 2.1.0-beta3
lua 4.lua timeout 0.0ms 2.3MB 4990ms 0ms lua 5.4.7

Input: 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 38ms 0.4ms 3.3MB 30ms 0ms crystal 1.16.3
crystal 1.cr 38ms 1.4ms 3.3MB 30ms 0ms crystal 1.16.3
lua 4.lua 75ms 1.4ms 2.3MB 70ms 0ms luajit 2.1.0-beta3
lua 4.lua 1160ms 15ms 2.3MB 1153ms 0ms lua 5.4.7

nsieve

Input: 12

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 350ms 2.1ms 8.3MB 340ms 0ms crystal 1.16.3
crystal 1.cr 432ms 2.5ms 42.9MB 420ms 0ms crystal 1.16.3

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 89ms 2.4ms 4.5MB 80ms 0ms crystal 1.16.3
crystal 1.cr 92ms 3.7ms 13.2MB 83ms 0ms crystal 1.16.3

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1928ms 26ms 6.3MB 1897ms 17ms crystal 1.16.3

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 447ms 9.3ms 4.9MB 433ms 0ms crystal 1.16.3

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 3760ms 10ms 4.5MB 3747ms 0ms crystal 1.16.3
lua 1.lua 4070ms 8.1ms 2.5MB 4060ms 0ms luajit 2.1.0-beta3
lua 1.lua timeout 0.0ms 2.4MB 4990ms 0ms lua 5.4.7

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 949ms 7.6ms 4.4MB 940ms 0ms crystal 1.16.3
lua 1.lua 1046ms 19ms 2.4MB 1037ms 0ms luajit 2.1.0-beta3
lua 1.lua timeout 0.0ms 2.1MB 4990ms 0ms lua 5.4.7

Input: 2000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 241ms 5.4ms 3.8MB 233ms 0ms crystal 1.16.3
lua 1.lua 258ms 1.6ms 2.3MB 250ms 0ms luajit 2.1.0-beta3
lua 1.lua timeout 0.0ms 2.0MB 4990ms 0ms lua 5.4.7