Programming Language and compiler
Benchmarks

Crystal VS Lua benchmarks

Current benchmark data was generated on Fri Aug 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
crystal 1.cr 1231ms 8.3ms 64.2MB 1203ms 10ms crystal 1.17.0
lua 1.lua 3513ms 23ms 173.0MB 3370ms 130ms luajit 2.1.0-beta3
lua 1.lua timeout 0.0ms 105.0MB 4950ms 37ms lua 5.4.7

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 104ms 1.6ms 11.0MB 90ms 0ms crystal 1.17.0
lua 1.lua 290ms 1.7ms 15.9MB 270ms 7ms luajit 2.1.0-beta3
lua 1.lua 817ms 0.3ms 17.0MB 800ms 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 1489ms 15ms 19.9MB 1420ms 57ms crystal 1.17.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 82ms 4.6ms 7.1MB 57ms 10ms crystal 1.17.0

edigits

Input: 250001

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 57ms 1.8ms 6.5MB 40ms 3ms crystal 1.17.0

Input: 100000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 22ms 1.7ms 5.3MB 10ms 0ms crystal 1.17.0

fannkuch-redux

Input: 11

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 2510ms 4.1ms 2.9MB 2497ms 0ms crystal 1.17.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 207ms 2.7ms 2.9MB 200ms 0ms crystal 1.17.0

fasta

Input: 2500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 540ms 2.0ms 3.6MB 450ms 77ms crystal 1.17.0
crystal 1.cr 681ms 2.0ms 14.6MB 570ms 97ms crystal 1.17.0

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 57ms 0.8ms 3.6MB 40ms 0ms crystal 1.17.0
crystal 1.cr 72ms 0.8ms 4.4MB 53ms 7ms crystal 1.17.0

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
lua 1.lua 1.4ms 0.1ms 2.4MB 0ms 0ms luajit 2.1.0-beta3
lua 1.lua 1.4ms 0.2ms 2.1MB 0ms 0ms lua 5.4.7
crystal 1.cr 1.9ms 0.1ms 2.9MB 0ms 0ms crystal 1.17.0

http-server

Input: 3000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1962ms 442ms 300.0MB 300ms 437ms crystal 1.17.0

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1239ms 102ms 53.0MB 27ms 77ms crystal 1.17.0

lru

Input: 1000 1000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 37ms 0.9ms 3.0MB 30ms 0ms crystal 1.17.0
crystal 1.cr 70ms 1.9ms 3.0MB 60ms 0ms crystal 1.17.0

Input: 1000 3000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 105ms 1.9ms 3.0MB 97ms 0ms crystal 1.17.0
crystal 1.cr 201ms 2.2ms 3.0MB 190ms 0ms crystal 1.17.0

Input: 100 500000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 0-unsafe.cr 19ms 1.2ms 3.0MB 10ms 0ms crystal 1.17.0
crystal 1.cr 33ms 1.2ms 3.0MB 20ms 0ms crystal 1.17.0

mandelbrot

Input: 5000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 314ms 1.7ms 9.3MB 303ms 0ms crystal 1.17.0

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 17ms 0.1ms 5.8MB 10ms 0ms crystal 1.17.0

merkletrees

Input: 17

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 838ms 12ms 64.2MB 820ms 7ms crystal 1.17.0
lua 1.lua timeout 0.0ms 107.4MB 4947ms 40ms lua 5.4.7
lua 1.lua timeout 0.0ms 149.4MB 4923ms 63ms luajit 2.1.0-beta3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 177ms 4.2ms 22.3MB 160ms 0ms crystal 1.17.0
lua 1.lua 1101ms 8.1ms 31.1MB 1073ms 17ms luajit 2.1.0-beta3
lua 1.lua 2192ms 63ms 28.8MB 2170ms 10ms lua 5.4.7

nbody

Input: 5000000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 345ms 2.9ms 3.4MB 337ms 0ms crystal 1.17.0
crystal 1.cr 346ms 3.1ms 3.4MB 337ms 0ms crystal 1.17.0
lua 4.lua 711ms 0.9ms 2.4MB 700ms 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 37ms 0.5ms 3.4MB 30ms 0ms crystal 1.17.0
crystal 1.cr 39ms 0.1ms 3.4MB 30ms 0ms crystal 1.17.0
lua 4.lua 77ms 1.2ms 2.3MB 70ms 0ms luajit 2.1.0-beta3
lua 4.lua 1145ms 12ms 2.3MB 1137ms 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 301ms 3.1ms 8.3MB 290ms 0ms crystal 1.17.0
crystal 1.cr 420ms 4.6ms 43.0MB 403ms 0ms crystal 1.17.0

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 74ms 0.2ms 4.5MB 70ms 0ms crystal 1.17.0
crystal 1.cr 89ms 0.6ms 13.2MB 80ms 0ms crystal 1.17.0

pidigits

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1960ms 30ms 6.3MB 1927ms 17ms crystal 1.17.0

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 438ms 11ms 5.0MB 430ms 0ms crystal 1.17.0

spectral-norm

Input: 8000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 3758ms 11ms 4.5MB 3750ms 0ms crystal 1.17.0
lua 1.lua 4064ms 5.2ms 2.5MB 4053ms 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 941ms 1.2ms 4.5MB 930ms 0ms crystal 1.17.0
lua 1.lua 1018ms 0.4ms 2.4MB 1010ms 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 242ms 3.7ms 3.9MB 233ms 0ms crystal 1.17.0
lua 1.lua 258ms 0.6ms 2.3MB 250ms 0ms luajit 2.1.0-beta3
lua 1.lua timeout 0.0ms 2.1MB 4990ms 0ms lua 5.4.7