Time to compile an optimized binary will be still slow for the foreseeable future.
You can follow the activity here: https://github.com/crystal-lang/crystal/pull/10910
I was pleasantly surprised myself that the interpreter actually already somewhat worked, as you can see in the demo: https://www.youtube.com/watch?v=een_W1YEICw&list=PLe1-A91ZPT...
The creator also claimed that the interpreter only need a few more months to finish.
Time to compile an optimized binary will be still slow for the foreseeable future.