2009/11/1 Igor Stasenko <siguc...@gmail.com>: > 2009/11/1 Lukas Renggli <reng...@gmail.com>: >>> Another question , which Stephane noted already, is the overhead of >>> broadcasting. >> >> First of all, announcements are magnitudes faster than the ancient >> change-update and trigger frameworks. >> > > i having zero interest in ancient stuff. This topic is about announcements. > >> The problem of broadcasting does not apply to announcements, because >> the observer only registers and receives events he is interested in. >> > nope. this problem applies to announcements as well. As soon as you > having multiple subscribers > listening for same event, sending this event to all of them is called > broadcasting. > Please tell me if this definition is wrong. > > But in addition, announcer also iterates even over those subscribers > who would never want to receive some announcements. > I thought that Stephane talking about this overhead, not about some > dusty, ancient code which i never seen. >
Igor, even if you open a shiny new Pharo image, I'm afraid you'll have to contemplate plenty of ancient code. Note sure the most ancient the most dusty though ;). FIY, st80 MVC was broadcasting to 99% of ignorers with a long chain of this kind: self changed: aSymbol SENT FROM THE MODEL -> self changed:with: --> self changed:with:from: ---> update:with:from: BROADCAST IN EACH dependents (each subview was potentially) --> update:with: -> update: I hope we don't replicate this scheme, I had understood Announcements did not thanks to explicit subscription. Anyway, a bit of archeology is always helpfull when cleaning Smalltalk... Nicolas >> Please read the blog posts of Vassily. >> > > Thanks, i'm already read his blog. > >> Lukas >> >> -- >> Lukas Renggli >> http://www.lukas-renggli.ch >> >> _______________________________________________ >> Pharo-project mailing list >> Pharo-project@lists.gforge.inria.fr >> http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project >> > > > > -- > Best regards, > Igor Stasenko AKA sig. > > _______________________________________________ > Pharo-project mailing list > Pharo-project@lists.gforge.inria.fr > http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project > _______________________________________________ Pharo-project mailing list Pharo-project@lists.gforge.inria.fr http://lists.gforge.inria.fr/cgi-bin/mailman/listinfo/pharo-project
