AFAIK, multi-core has been available for quite some time now (unsure about specific disclaimers/missing features) with the `-Dpreview_mt` flag. Here are two res

AFAIK, multi-core has been available for quite some time now (unsure about specific disclaimers/missing features) with the `-Dpreview_mt` flag. Here are two resources demonstrating it: - https://crystal-lang.org/2019/09/06/parallelism-in-crystal.html https://crystal-lang.org/2019/09/06/parallelism-in-crystal.h... (2019) - https://github.com/bcardiff/crystal-benchmarks https://github.com/bcardiff/crystal-benchmarks