Crystal: Bdw-GC Coroutines Support

crystal-lang.org

21 pointsksec3 comments

So what is the status of Crystal multi-core now? My understanding was that Crystal enables Go-like concurrency (green threads communicating over channels) except they call "go" "spawn". Except it was still single-core and they were working on multi-core?

From what I've seen I really like Crystal. It has good ideas and they're working on a dang REPL! I'd like if it took over some of Go's share, and I'd like to not have to say "but they're still working on multi-core".

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.h... (2019)

- https://github.com/bcardiff/crystal-benchmarks

Yeah so it’s still not first-class in the language and off by default. Thanks for the links.

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