From: Rick DeNatale Date: 2009-04-03T00:05:51+09:00 Subject: Re: Move over, Phusion, here comes the *real* Enterprise Edition! --0016e644cb283f59d3046693c5e3 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On Thu, Apr 2, 2009 at 10:55 AM, Michael Neumann wrote: > M. Edward (Ed) Borasky wrote: > > > On Wed, Apr 1, 2009 at 6:00 AM, Charles Oliver Nutter > > wrote: > >> Well, according to the earliest drafts of the Ruby standard, > >> continuations are not part of "core Ruby" :) > >> > >> But yes, this is one area we've opted not to be compatible in exchange > >> for performance. We could implement continuations, but we'd be several > >> times slower as a result. > > > > IIRC YARV also dropped continuations because they would be slow on the > > YARV VM as well. > > Which YARV do you mean? The one integrated into Ruby 1.9? :) > So I know for sure that Ruby 1.9 still has continuations, that they rule > the > world when compared against Ruby 1.8 continuations (which had memory > leaks), > and that Ruby 1.9 it is based on Koichi's YARV. ;-) IIRC (sometimes hard to do at my age) continuations were gone from Ruby 1.9 for a while back in 1997, but came back before the Ruby 1.9.0 release around Christmas 2007. As for implementation, I think that the spaghetti stack design which Evan Phoenix is/was? using in Rubinius, (which is similar to what the Squeak Smalltalk VM uses) helps a lot. On the other hand, Seaside, which drove a lot of interest in continuations in the Smaltalk community, feeding back to Rubyists who wanted to emulate Seaside, has rather drastically reduced, but not eliminated, the use of continuations. -- Rick DeNatale Blog: http://talklikeaduck.denhaven2.com/ Twitter: http://twitter.com/RickDeNatale WWR: http://www.workingwithrails.com/person/9021-rick-denatale LinkedIn: http://www.linkedin.com/in/rickdenatale --0016e644cb283f59d3046693c5e3--