09:33 <hightower2> Hey if anyone has comments on questions mentioned in https://play.crystal-lang.org/#/r/buxo , please share. Thanks.

09:35 <FromGitter> <HertzDevil> if you don't want to do the include then it needs `responds_to?` with argument types or traits

09:35 <FromGitter> <HertzDevil> (or concepts, as they're called in c++)

09:42 <hightower2> Oh right.. although then one also needs to leave the type completely unspecified. Ok, thanks.

12:43 <FromGitter> <nanobowers> Was looking at the wiki here: https://github.com/crystal-lang/crystal/wiki/Metaprogramming-Help#how-to-mimic-send-using-records-and-generated-lookup-tables ⏎ and it's a stub that says "Sample code + explanation". 😆 Anyone know where i might find an example of this

12:53 <FromGitter> <Blacksmoke16> the easiest solution is to just not do it :P

12:53 <FromGitter> <Blacksmoke16> otherwise, you can kinda replicate it via a `case` over the method name, and calls it

12:54 <FromGitter> <HertzDevil> it's still viable if there are no overloads like in ruby

12:55 <FromGitter> <HertzDevil> and no argument restrictions

15:05 <SamantazFox_> Hello there!

15:06 <SamantazFox_> Just to be sure: Crystal by default is single threaded, right?

15:06 <FromGitter> <jfontan:matrix.org> right

15:08 <SamantazFox_> Ok, thanks

15:09 <SamantazFox_> So idk how one person is having multiple threads listed in htop

15:09 <SamantazFox_> doesn't makes sense

15:10 <FromGitter> <Blacksmoke16> are they using `fork`?

15:16 <SamantazFox_> No

15:16 <SamantazFox_> They use the same code as we do, and the same systemd file

15:29 <FromGitter> <asterite> The GC runs multiple threads

15:30 <FromGitter> <asterite> (if I remember correctly)

15:30 <FromGitter> <jfontan:matrix.org> is there also a IO thread?

15:31 <FromGitter> <asterite> I don't think so

15:31 <FromGitter> <jfontan:matrix.org> 👍️

15:44 <SamantazFox_> asterite: the GC only uses MT if `preview_mt` flag is passed

15:45 <FromGitter> <Blacksmoke16> 🤔 are you sure?

15:45 <yxhuvud> Uh, I'm not certain the GC cares about preview_mt at all

15:45 <SamantazFox_> just checked the code

15:45 <yxhuvud> could it be some lifecycle issue? Like your restart functionality perhaps doesn't kill the original or something?

15:45 <SamantazFox_> https://github.com/crystal-lang/crystal/blob/6d9a1d583/src/gc/boehm.cr#L104-L106

15:46 <yxhuvud> that lock is not doing what you think. It locks accesses to the gc from other crystal code, but the gc can still be multithreaded beneath it

15:49 <FromGitter> <asterite> 100% sure it's the GC. Try a small program that does `GC.collect; gets` then sample it (in mac osx you can do it in the Activity Monitor, I don't know for other systems)

15:53 <SamantazFox_> asterite: GG

15:53 <SamantazFox_> it's that

15:56 <SamantazFox_> thanks :)

15:57 <FromGitter> <asterite> Cool! 🎉