(has nothing to do with the drug)

“Crystal is a general-purpose, object-oriented programming language, designed and developed by Ary Borenszweig, Juan Wajnerman, Brian Cardiff and more than 300 contributors.[5] With syntax inspired by the language Ruby,[4] it is a compiled language with static type-checking, but specifying the types of variables or method arguments is generally unneeded. Types are resolved by an advanced global type inference algorithm.[6] Crystal is currently in active development. It is released as free and open-source software under the Apache License version 2.0″ (Wiki)


puts "Hello World!"

show me the src https://github.com/crystal-lang

and: is it good? is it fast?

Matt says “yes” “very readable”.


But is it fast?



so to make any usefull comparison (this i5 CPU might or might be not faster/slower than Mr Matt London’s CPU, making this comparison unfair)

“3.0 is slower than 2.5 on official benchmarks” (src)

hostnamectl; # tested on (benchmarks were run inside Debian 11 KVM)
  Operating System: Debian GNU/Linux 11 (bullseye)
            Kernel: Linux 5.10.0-19-amd64

# host system
Model name:                      Intel(R) Core(TM) i5-4300U CPU @ 1.90GHz
Stepping:                        1
CPU MHz:                         2594.160

su - root
apt update
apt install python2 python3; # install if not already
# there is a "bash" (?) build in time command but it is not the same
apt install time
Ctrl+D; # logout as root, become non-root again
# download it
git clone https://github.com/Matt-London/youtube-tutorial-scripts.git
python; # there are many versions
python2 python2.7 python3 python3.9

./speedTest.sh python3.9 pyTest.py; # bench python3.9
real 11.679

./speedTest.sh python3 pyTest.py; # bench python3
real 11.688; # basically same speed as 3.9

./speedTest.sh python2.7 pyTest.py; # bench python2.7
real 10.662

./speedTest.sh python2 pyTest.py; # bench python2
real 9.355 <- so python2 IS STILL the fastest python, that's the reason why it is still around...

bench PHP8.1

hint: opening a file with “hard coded” array of 10.000x numbers… Eclipse PDT will simply stall! X-D (Java’s massive memory requirements fault?)

(vim not… but the syntax highlighting gave up half way… after 5000 numbers)

here it is, the: “PHP8.1_bench_bubblesort_10000_numbers_speedTest” aka Matt London speed test:


  • install php8.1
  • run it properly

# this way, the output is more meaningful, as the OS & CPU & PHP version are also included

hostnamectl; lscpu; php --version; ./speedTest.sh php MattLondonSpeedTest_v1.php

real 6.055 <- so this makes php8.1 perform somewhere between Ruby and Crystal
(but Crystal really seems pretty fast)

btw: (completely unrelated)


“The Adam Project” an underestimated, actually worth watching SciFi pearl on FLIXNET https://www.netflix.com/de-en/title/81309354

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