On Mon, Jan 21, 2019 at 1:13 PM Hernán Morales Durand < hernan.mora...@gmail.com> wrote:
> > Done. > > I have some possible myths, but I'd like to confirm or reject: > > - All Smalltalk bytecode sets are stack-based VM. (?) > While there might be some implementations that use a register based bytecode set I've never heard of one. I do know of a few implementations that don't use bytecode at all. > - Bytecodes are always fixed-size. (?) > False. > - Most of the time spent by a VM is in the instruction interpreter. > (actually it's in the GC right?) > Neither. In a JIT VM most time is spent executing Smalltalk code. GC overheads vary depending on workload, typically in the range 1% to 50% (typically for specially constructed benchmarks written to stress the GC). > - You cannot serialize objects containing blocks. (IIRC one can use > MessageSends) > False. > - Image cannot be bootstrapped. (This is possible in ST/X and now in Pharo > I think). > False. > - All Smalltalks includes UI classes. (GemStone doesn't have AFAIK). > False. > - All implementations uses direct pointers, (GST?) > False. VisualWorks uses indirection pointers. Xerox Smalltalk-80 implementations used indirection. But many modern implementations use direct pointers. > - All implementations uses green threads. (VAST? MT?) > False. SmalltalkMT. But still mostly true. VAST & VW have green threads and a threaded FFI. > I'm sure people in this list will have a lot more myths heard from > Conferences, Forums, Videos, Talks, etc. Like the guy who said Smalltalk > was dead. So if you did something which could be ignored publicly, please > don't hesitate to reply or ping me to get added as collaborator. > > Cheers, > > Hernán > > > > El dom., 20 ene. 2019 a las 22:41, Eliot Miranda (<eliot.mira...@gmail.com>) > escribió: > >> Hi Hernán, >> >> On Sun, Jan 20, 2019 at 2:31 PM Hernán Morales Durand < >> hernan.mora...@gmail.com> wrote: >> >>> Hi there, >>> >>> I just created a GitHub repo to collect myths around Smalltalk-based >>> technologies: Pharo, Squeak, VW, VAST, Smalltalk/X, GNU/ST, etc. in the >>> spirit of the Falsehoods lists [1-4]. >>> >>> This is just a draft now but please feel free to add falsehoods based on >>> your own experiences. Examples are greatly appreciated. >>> >> >> You want pull requests? If not, would you give me write permission? I'd >> love to add to the "Smalltalk is obsolete" section... >> >> >>> >>> https://github.com/hernanmd/falsehoods_smalltalk >>> >>> Cheers, >>> >>> Hernán >>> >>> [1] >>> https://infiniteundo.com/post/25326999628/falsehoods-programmers-believe-about-time >>> [2] >>> https://chiselapp.com/user/ttmrichter/repository/gng/doc/trunk/output/falsehoods.html >>> [3] >>> https://github.com/googlei18n/libphonenumber/blob/master/FALSEHOODS.md >>> [4] >>> https://meta-package-manager.readthedocs.io/en/develop/falsehoods.html >>> >>> >>> >> >> -- >> _,,,^..^,,,_ >> best, Eliot >> > -- _,,,^..^,,,_ best, Eliot
