Programming Language and compiler
Benchmarks

Crystal VS Lua benchmarks

Current benchmark data was generated on Tue Jul 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 1302ms 4.1ms 64.2MB 1273ms 17ms crystal 1.16.3
lua 1.lua 3562ms 89ms 173.0MB 3437ms 113ms luajit 2.1.0-beta3
lua 1.lua timeout 0.0ms 105.0MB 4953ms 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 2.8ms 11.0MB 100ms 0ms crystal 1.16.3
lua 1.lua 289ms 0.8ms 15.8MB 260ms 10ms luajit 2.1.0-beta3
lua 1.lua 828ms 3.7ms 16.9MB 810ms 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 1515ms 15ms 19.9MB 1450ms 53ms crystal 1.16.3

Input: 1000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 86ms 1.0ms 7.1MB 60ms 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 0.7ms 7.5MB 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 1.3ms 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 2487ms 23ms 2.9MB 2473ms 0ms crystal 1.16.3

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 205ms 3.6ms 2.9MB 197ms 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 2.4ms 3.5MB 450ms 70ms crystal 1.16.3
crystal 1.cr 681ms 3.2ms 14.6MB 570ms 97ms crystal 1.16.3

Input: 250000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 58ms 1.8ms 3.6MB 40ms 7ms crystal 1.16.3
crystal 1.cr 72ms 0.7ms 4.9MB 53ms 7ms crystal 1.16.3

helloworld

Input: QwQ

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
lua 1.lua 1.4ms 0.1ms 2.0MB 0ms 0ms lua 5.4.7
lua 1.lua 1.4ms 0.2ms 2.4MB 0ms 0ms luajit 2.1.0-beta3
crystal 1.cr 2.0ms 0.1ms 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 3132ms 646ms 240.8MB 317ms 443ms crystal 1.16.3

Input: 500

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 1178ms 104ms 53.1MB 30ms 80ms 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 0.7ms 3.0MB 30ms 0ms crystal 1.16.3
crystal 1.cr 65ms 1.5ms 3.0MB 57ms 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 102ms 0.4ms 3.0MB 90ms 0ms crystal 1.16.3
crystal 1.cr 189ms 6.6ms 3.0MB 177ms 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 18ms 0.7ms 3.0MB 10ms 0ms crystal 1.16.3
crystal 1.cr 30ms 1.5ms 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 315ms 1.4ms 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 0.4ms 6.4MB 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 867ms 21ms 64.2MB 843ms 10ms crystal 1.16.3
lua 1.lua timeout 0.0ms 107.4MB 4950ms 40ms lua 5.4.7
lua 1.lua timeout 0.0ms 149.3MB 4923ms 60ms luajit 2.1.0-beta3

Input: 15

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 174ms 3.9ms 22.3MB 157ms 0ms crystal 1.16.3
lua 1.lua 1431ms 31ms 31.3MB 1400ms 17ms luajit 2.1.0-beta3
lua 1.lua 2403ms 38ms 28.8MB 2383ms 3ms 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 2.4ms 3.3MB 333ms 0ms crystal 1.16.3
crystal 1.cr 350ms 6.8ms 3.4MB 343ms 0ms crystal 1.16.3
lua 4.lua 715ms 1.4ms 2.4MB 710ms 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 1.cr 38ms 1.2ms 3.3MB 30ms 0ms crystal 1.16.3
crystal 2.cr 38ms 0.4ms 3.4MB 30ms 0ms crystal 1.16.3
lua 4.lua 81ms 9.6ms 2.3MB 73ms 0ms luajit 2.1.0-beta3
lua 4.lua 1148ms 64ms 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 348ms 2.9ms 8.3MB 337ms 0ms crystal 1.16.3
crystal 1.cr 422ms 6.9ms 43.0MB 413ms 0ms crystal 1.16.3

Input: 10

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 2.cr 87ms 1.4ms 4.5MB 80ms 0ms crystal 1.16.3
crystal 1.cr 90ms 3.2ms 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 1981ms 59ms 6.2MB 1957ms 13ms crystal 1.16.3

Input: 4000

lang code time stddev peak-mem mem time(user) time(sys) compiler compiler/runtime
crystal 1.cr 456ms 13ms 5.0MB 440ms 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 3763ms 15ms 4.6MB 3753ms 0ms crystal 1.16.3
lua 1.lua 4063ms 3.7ms 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 946ms 8.1ms 4.4MB 933ms 0ms crystal 1.16.3
lua 1.lua 1020ms 2.2ms 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 244ms 2.8ms 3.9MB 237ms 0ms crystal 1.16.3
lua 1.lua 258ms 0.3ms 2.3MB 250ms 0ms luajit 2.1.0-beta3
lua 1.lua timeout 0.0ms 2.0MB 4990ms 0ms lua 5.4.7